mda Railway Object Name Thesaurus
0-9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, [Contents]

M door
The door at the front of a cab used for emergency detraining.
Warrant: LUL Jargon Buster
Plural form: M doors

CL Vehicles and vehicle components
BT vehicle door


machine tool
Any power-operated machines, such as lathes, used for general cutting and shaping of metal and other substances.
Warrant: Art & Architecture Thesaurus, Getty Art History Information Program, Oxford University Press, 1990
Plural form: machine tools

CL Tools and equipment
BT engineering workshop tools and equipment
NT lathe
NT wheel truing machine


machine wagon
A railway vehicle dedicated to the carriage of machinery.
Literary warrant required.
Plural form: machine wagons

CL Vehicles and vehicle components
BT <machinery, etc. carrying vehicles>


<machinery, etc. carrying vehicles>
Railway vehicles dedicated to the carriage of machinery.
Plural form: <machinery, etc. carrying vehicles>

CL Vehicles and vehicle components
BT <rolling stock by load or function>
NT agricultural implement wagon
NT boiler wagon
NT case wagon
NT gas economiser wagon
NT girder wagon
NT gun set
NT implement wagon
NT low machine wagon
NT machine wagon
NT mill roll wagon
NT nuclear flask wagon
NT pulley wagon
NT skeleton wagon
NT tank transporting wagon
NT transformer wagon
NT trolley wagon
NT well wagon
NT wheel and propeller wagon


magnetic levitation stock
Vehicles operated on the magnetic levitation system.
Literary warrant required.
Plural form: magnetic levitation stock

CL Vehicles and vehicle components
BT fixed propulsion stock


MAG-LEV railway
A magnetic levitational transit system.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: MAG-LEV railways

CL Railway types
BT <self-propelled railways by adhesion method>


mail exchange apparatus (lineside)
The lineside equipment used for transferring mail bags from moving trains to the ground.
Warrant: The British Travelling Post Office, PJ Johnson, Ian Allan Ltd, 1985
Plural form: mail exchange apparatus (lineside)

CL Built works and components
BT <parcels and mail handling structures>


mail exchange apparatus (vehicle assembly)
The on-train equipment used for transferring mail bags from moving trains to the ground.
Literary warrant required.
Plural form: mail exchange apparatus (vehicle assembly)

CL Vehicles and vehicle components
BT access component


mail train (conveying passengers)
Scope note required.
Literary warrant required.
Plural form: mail trains (conveying passengers)

CL Vehicles and vehicle components
BT passenger train


mail train (not conveying passengers)
Scope note required.
Literary warrant required.
Plural form: mail trains (not conveying passengers)

CL Vehicles and vehicle components
BT passenger rated traffic train


mail van
A vehicle designed specifically for the collection, sorting, conveyance and discharge of mail
Warrant: The British Travelling Post Office, P J Johnson, Ian Allan Ltd, 1985
Plural form: mail vans

CL Vehicles and vehicle components
BT <mail, parcels, etc. carrying vehicles>
NT sorting tender
NT stowage van
NT travelling post office


<mail, parcels, etc. carrying vehicles>
Railway vehicles dedicated to the carriage of mail, parcels, newspapers and similar traffic.
Plural form: <mail, parcels, etc. carrying vehicles>

CL Vehicles and vehicle components
BT <rolling stock by load or function>
NT bullion van
NT full brake van
NT general utility van
NT luggage van (no passenger accommodation)
NT mail van
NT newspaper van
NT parcels van
NT theatrical scenery van


main arm
An arm of a semaphore signal controlling a running movement.
Warrant: The History & Development of Railway Signalling in the British Isles, Friends of the National Railway Museum
Plural form: main arms

CL Control and communications
BT signal arm


main line air gauge
Scope note required.
Literary warrant required.
Plural form: main line air gauges

CL Vehicles and vehicle components
BT <air pipes, reservoirs, etc.>


main line isolating cock control
Scope note required.
Literary warrant required.
Plural form: main line isolating cock controls

CL Vehicles and vehicle components
BT <air pipes, reservoirs, etc.>


main line pressure switch isolating
Scope note required.
Literary warrant required.
Plural form: main line pressure switches isolating

CL Vehicles and vehicle components
BT <pneumatic valves, gauges, etc.>


main line pressure switch test
Scope note required.
Literary warrant required.
Plural form: main line pressure switch tests

CL Vehicles and vehicle components
BT <pneumatic valves, gauges, etc.>


main line (route)
An important route linking major traffic centres.
Warrant: Railtrack London & North Eastern, A Glossary of Railway Terms, October 1998
Plural form: main lines (route)

CL Built works and components
BT <route by status>
RT main line (running line)


main line (running line)
Usually the fastest line(s) in a multiple track area or the running lines in two track section.
Warrant: Railtrack London & North Eastern, A Glossary of Railway Terms, October 1998
Plural form: main lines (running lines)

CL Track and track components
BT <running lines by speed of working>
RT main line (route)


main reservoir
A pressure vessel mounted in or under a railway vehicle to store compressed air for pneumatic systems such as brakes, power doors and air suspension.
Warrant: Railway Technical Web Pages, Piers Connor, 2000
Plural form: main reservoirs

CL Vehicles and vehicle components
BT <air pipes, reservoirs, etc.>


main reservoir pipe
Air pipe connecting all main reservoirs on a train from which supplies for pneumatic systems are drawn.
Warrant: Railway Technical Web Pages, Piers Connor, 2000
Plural form: main reservoir pipes

CL Vehicles and vehicle components
BT <air pipes, reservoirs, etc.>


main steam pipe
The pipe which connects the regulator valve with the cylinder steam chest, steam passes down this pipe when the regulator valve is opened by the driver.
Literary warrant required.
Plural form: main steam pipes

UF steam pipe
CL Vehicles and vehicle components
BT <steam transmission components>


makers plate
A cast metal plate identifying the vehicle date and location of manufacture of the vehicle to which it affixed.
Warrant: British Locomotive Builders' Plates, K Buckle & D Love, Midland Publishing Ltd, 1994
Plural form: makers plates

USE works plate
CL Vehicles and vehicle components
BT <builders identity plates>


Mallet combined rack and adhesion locomotive
A locomotive of the Mallet wheel/cylinder configuration which also drives itself through a rack and pinion system on steep grades.
Warrant: Articulated Locomotives, L Wiener, 1930
Plural form: Mallet combined rack and adhesions

CL Vehicles and vehicle components
BT rack locomotive


manhole cover (boiler)
A removable cover giving access to the interior of a locomotive boiler.
Warrant: The Locomotive of Today, Locomotive Publishing Company, 1927
Plural form: manhole covers (boiler)

CL Vehicles and vehicle components
BT boiler component


manhole cover (ground)
A cast metal cover for the opening to a inspection shaft or chamber at ground level.
Warrant: Railway Terminology Working Group
Plural form: manhole covers

CL Built works and components
BT <built work components by type>


manhole (vehicle)
Scope note required.
Literary warrant required.
Plural form: manholes (vehicle)

CL Vehicles and vehicle components
BT hatch component


manifold (steam)
The steam pipe in the cab which supplied all the cab control valves such as whistle, injectors, train heating, blower, sanders, etc.
Warrant: Locomotives and Their Working, C R H Simpson & F B Roberts, Virtue & Co Ltd, 1952
Plural form: manifolds (steam)

USE steam manifold
CL Vehicles and vehicle components
BT <steam transmission components>


manned level crossing
A level crossing that is operated or supervised by a railway employee.
Warrant: The History & Development of Railway Signalling in the British Isles, Friends of the National Railway Museum
Plural form: manned level crossings

CL Control and communications
BT <level crossings by operation>
NT locally controlled manned level crossing
NT remotely controlled manned level crossing


Mansell wheel
A carriage wheel, the centre of which consists of wooden segments.
Warrant: Modern Railway Working, A Practical Treatise by Engineering and Administrative Experts, Volume 5, John Macaulay (Ed), The Gresham Publishing Company, 1913
Plural form: Mansell wheels

CL Vehicles and vehicle components
BT disc wheel


mantle testing machine
Scope note required.
Literary warrant required.
Plural form: mantle testing machines

CL Unattributed
BT <unattributed>


manually controlled barrier
A manned level crossing with full barriers and operated locally at a control centre, signalbox or gatebox.
Warrant: The History & Development of Railway Signalling in the British Isles, Friends of the National Railway Museum
Plural form: manually controlled barriers

CL Control and communications
BT level crossing barrier


manure wagon
A railway vehicle dedicated to the carriage of manure.
Literary warrant required.
Plural form: manure wagons

CL Vehicles and vehicle components
BT <other special traffic vehicles>


map
A document, poster or sign showing stations, routes and locations served in cartographic form.
Warrant: Railway Relics and Regalia, Ed P Whitehouse, Country Life, 1975
Plural form: maps

CL Commercial records and equipment
BT <advertising and publicity>


marker board
A double-sided yellow board with two vertical red-yellow flashing lights on one side and two yellow lights on the other used to indicate a work site.
Warrant: Railtrack Jargon Buster, 1999
Plural form: marker boards

CL Control and communications
BT <trackside indicators>


market ticket
A ticket offered at a discounted price to the regular fare for travellers attending the market at the destination town.
Literary warrant required.
Plural form: market tickets

CL Commercial records and equipment
BT <travel tickets by discount, etc.>


<marshalling complexes>
Scope note required.
Plural form: <marshalling complexes>

CL Built works and components
BT <complexes>
NT marshalling yard
RT <marshalling buildings & structures>


<marshalling structures>
Buildings and other structures connected with the operation of train marshalling facilities.
Plural form: <marshalling structures>

CL Built works and components
BT <single built works>
RT <marshalling complexes>


marshalling yard
A complex of sidings in which marshalling of trains takes place.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: marshalling yards

CL Built works and components
BT <marshalling complexes>
NT gridiron


Martin disc signal
A type of signal used on the London and South Western Railway in the nineteenth century that gave an indication by means of a circular board with a semicircular cut-out rotating about both a vertical and horizontal axis allowing just one signal to give danger and clear indications in all permutations for running lines in both directions.
Literary warrant required.
Plural form: Martin disc signals

CL Control and communications
BT <primitive disc and bar signals>
RT disc signal


master control switch
An electrical switch operated by the control key, which, when operated, changes the operational state of a train.
Warrant: LUL Jargon Buster
Plural form: master control switches

CL Vehicles and vehicle components
BT <master controls>


master controller
A driver's power control device located in the cab.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: master controllers

CL Vehicles and vehicle components
BT <master controls>


<master controls>
Scope note required.
Plural form: <master controls>

CL Vehicles and vehicle components
BT <driving and control components>
NT drivers control
NT drivers key
NT driving key from electric locomotive
NT electric locomotive control key
NT master control switch
NT master controller
NT traction control cut-out switch
NT vigilance device


master logic unit
Scope note required.
Literary warrant required.
Plural form: master logic units

CL Unidentified
BT <unidentified terms>


match truck
A wagon placed beneath an overhanging crane jib or freight load on an adjoining vehicle. Also used to mean a vehicle with more than one type of drawgear to enable wagons with non-compatible drawgear to be marshalled in the same train. In this thesaurus the latter sense is covered by the terms 'adaptor vehicle' and 'adaptor wagon'.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: match trucks

UF match wagon
CL Vehicles and vehicle components
BT runner (vehicle)


match wagon
A wagon placed beneath an overhanging crane jib or freight load on an adjoining vehicle. Also used to mean a vehicle with more than one type of drawgear to enable wagons with non-compatible drawgear to be marshalled in the same train. In this thesaurus the latter sense is covered by the terms 'adaptor vehicle' and 'adaptor wagon'.
Warrant: Encyclopedia of Railways, O S Nock, 1977
Plural form: match wagons

USE match truck
CL Vehicles and vehicle components
BT runner (vehicle)


matchstriker
Scope note required.
Literary warrant required.
Plural form: matchstrikers

CL Vehicles and vehicle components
BT <passenger and staff facility components>


materials handling tug
An on-track machine used for handling track maintenance materials.
Warrant: On-track plant on British Railways, Roger Butcher, Platform 5 Publishing Ltd, 4th edition, 1981, p13
Plural form: materials handling tugs

CL Vehicles and vehicle components
BT <track maintenance vehicles>


Matisa instrument
A device for calibrating the gauges in the cab of Matisa track inspection vehicles.
Warrant: National Railway Museum
Plural form: Matisa instruments

CL Tools and equipment
BT track testing equipment


mayday alarm control
Scope note required.
Literary warrant required.
Plural form: mayday alarm controls

CL Vehicles and vehicle components
BT passenger emergency communication


mayday alarm indicator
Scope note required.
Literary warrant required.
Plural form: mayday alarm indicators

CL Vehicles and vehicle components
BT passenger emergency communication


<meat and poultry product carrying vehicles>
Railway vehicles dedicated to the carriage of raw and processed meat and poultry products.
Plural form: <meat and poultry product carrying vehicles>

CL Vehicles and vehicle components
BT <foodstuff carrying vehicles>
NT egg van
NT meat van
NT sausage van


meat container
A demountable freight container intended for the carriage of meat.
Literary warrant required.
Plural form: meat containers

CL Vehicles and vehicle components
BT freight container


meat van
A wagon intended for the carriage of meat.
Literary warrant required.
Plural form: meat vans

CL Vehicles and vehicle components
BT <meat and poultry product carrying vehicles>
NT insulated meat van
NT refrigerated meat van
NT ventilated meat van
NT ventilated/insulated meat van


<mechanical brake transmission components>
Parts of the braking system that transmit movement mechanically from a slave brake cylinder (or directly from a brake lever or wheel) to the brake itself.
Plural form: <mechanical brake transmission components>

CL Vehicles and vehicle components
BT braking system component
NT brake hanger
NT brake pivot
NT brake rigging
NT brake rod
NT brake shaft
NT crossbeam
NT safety loop
NT tread brake unit


<mechanical brake tripping devices>
Scope note required.
Plural form: <mechanical brake tripping devices>

CL Control and communications
BT automatic train control equipment
NT trainstop
NT trainstop ramp
NT trip arm lever
NT tripcock arm


mechanical door lock
Scope note required.
Literary warrant required.
Plural form: mechanical door locks

CL Vehicles and vehicle components
BT vehicle door component


mechanical frame
An interlocking mechanism controlling the movement of points and signals.
Warrant: Ray Towell, Curator of Operations, National Railway Museum
Plural form: mechanical frames

CL Control and communications
BT <lever frames by transmission>


mechanical governor
Scope note required.
Literary warrant required.
Plural form: mechanical governors

CL Vehicles and vehicle components
BT governor


mechanical horse
A specialised road vehicle with a tight turning circle widely used by the railways for delivery purposes.
Warrant: Mechanical Horses, B Aldridge, Trans-Pennine Publishing, 2000
Plural form: mechanical horses

CL Vehicles and vehicle components
BT road vehicle


<mechanical interlocking equipment>
Mechanically operated equipment for controlling the setting and releasing of signals and points to prevent unsafe conditions arising.
Plural form: <mechanical interlocking equipment>

CL Control and communications
BT lever frame component
NT interlocking gear
NT lever frame lock cover
NT lock (interlocking component)
NT locking bar (interlocking component)
NT tappet (interlocking component)
RT <electrical interlocking equipment>


mechanical line clear indicator
Scope note required.
Literary warrant required.
Plural form: mechanical line clear indicators

CL Control and communications
BT block instrument


mechanical lubricator
An oil distribution system activated by pump action provided by mechanical connections to the valve gear of a steam locomotive.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: mechanical lubricators

CL Vehicles and vehicle components
BT lubricator


<mechanical off-track motive power>
Any powered vehicle not running on rails used for moving railway vehicles.
Plural form: <mechanical off-track motive power>

CL Vehicles and vehicle components
BT <off-track motive power>
NT electric tow tractor
NT shunting tractor
NT tractor


mechanical points
Points which are operated without any form of power assistance.
Warrant: Railtrack Jargon Buster, 1999
Plural form: mechanical points

CL Track and track components
BT <turnouts by operation>


<mechanical protection>
Equipment remote from the control centre that mechanically protects trains from accident by preventing conflicting movements of points and signals, points and approaching trains, etc.
Plural form: <mechanical protection>

CL Control and communications
BT <point and signal actuation>
NT < mechanical train detection, etc.>
NT <point detection, etc.>
NT <point locking equipment>


mechanical stoker
A system for feeding coal into the firebox removing the need for it to be done manually by the fireman.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: mechanical stokers

CL Vehicles and vehicle components
BT <fuel supply components>


<mechanical train detection, etc.>
Mechanical equipment that detects the presence of vehicles passing over points, fouling another track or standing in a terminal or bay platform, etc. and in consequence locks points or signals in order to prevent conflicting movements.
Plural form: <train detection, etc.>

CL Control and communications
BT <mechanical protection>
NT depression bar
NT facing point lock bar
NT fouling bar
RT <train detection systems>


mechanical transmission locomotive
A locomotive where the wheels and the prime mover are mechanically coupled in order to transmit power.
Warrant: Modern Railway Traction, Railway Manufacturers Association, undated
Plural form: mechanical transmission locomotives

CL Vehicles and vehicle components
BT <locomotives by transmission>
NT chain driven locomotive
RT diesel mechanical locomotive


<mechanical transmission>
Equipment that transmits control from the control point to the equipment to be actuated by purely mechanical means. Includes equipment such as point rodding, signal wires, etc. and their associated pulleys, cranks, bearings, etc..
Plural form: <mechanical transmission>

CL Control and communications
BT <control transmission>
NT < rod transmission>
NT <wire transmission>


medium sided wagon
An open railway wagon with sides two or three planks high.
Warrant: An Illustrated History of BR Wagons, Volume 1, Paul Bartlett, David Larkin, Trevor Mann, Roger Silsbury & Andrew Ward, Oxford Publishing Company, 1985
Plural form: medium sided wagons

CL Vehicles and vehicle components
BT <open vehicles by height>


meeting
The passing loop in the middle of an incline where two sets were run simultaneously to allow them to pass each other.
Warrant: Railtrack Jargon Buster, 1999
Plural form: meetings

CL Track and track components
BT <loops, refuges, etc.>
RT inclined plane


merry-go-round train
A formation of mineral hopper wagons which can be loaded with and discharge coal whilst on the move.
Warrant: Phil Atkins, National Railway Museum
Plural form: merry-go-round trains

CL Vehicles and vehicle components
BT <trains by traffic flow>


merry-go-round wagon
A special hopper wagon used in merry-go-round trains for coal distribution from colliery or other bulk loading point to a power station.
Warrant: Railtrack Jargon Buster, 1999
Plural form: merry-go-round wagons

CL Vehicles and vehicle components
BT <rolling stock by route/operating pattern>


mess van
A downgraded vehicle used by railway staff for eating and resting.
Warrant: Phil Atkins, National Railway Museum
Plural form: mess vans

CL Vehicles and vehicle components
BT <personnel accommodation>


metro
A passenger railway that primarily serves an urban area, typically a city centre and its suburbs, operating an intensive service with closely spaced stations, at least some of which are likely to be underground.
Literary warrant required.
Plural form: metros

CL Railway types
BT <railways by places served>
RT overhead railway
RT underground railway


micrometer
A gauge for accurate small-scale measurement.
Warrant: Oxford English Dictionary
Plural form: micrometers

CL Tools and equipment
BT <general test equipment>


middle bearer
Any carriage or wagon underframe cross member other than the two end ones, which are designated 'headstocks'.
Warrant: Railway Mechanical Engineering, A R Bell et al., Gresham Publishing Company Ltd, 1923 p99
Plural form: middle bearers

UF crossbar
CL Vehicles and vehicle components
BT underframe component


mikado locomotive
A steam locomotive with a 2-8-2 wheel arrangement.
Warrant: Locomotive Cyclopedia of American Practice, 13th Edition, 1947
Plural form: mikados

CL Vehicles and vehicle components
BT eight coupled locomotive


mile post
A post set at quarter mile intervals measuring the distance along the railway line.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: mile posts

CL Built works and components
BT <signs and markers>


mileage plate
A plate fixed to a railway vehicle that states when the next service is due.
Warrant: Railway Terminology Working Group
Plural form: mileage plates

CL Vehicles and vehicle components
BT <running record plates, etc.>


military railway
A railway built either to support a military campaign, to by the military for training purposes.
Warrant: The Longmoor Military Railway, D W Ronald & R J Carter, David & Charles, 1974
Plural form: military railways

CL Railway types
BT <railways by function>
NT munitions railway
NT range railway
NT trench railway
RT state railway


<milk and dairy product carrying vehicles>
Railway vehicles dedicated to the carriage of milk and dairy products.
Plural form: <milk and dairy product carrying vehicles>

CL Vehicles and vehicle components
BT <foodstuff carrying vehicles>
NT butter van
NT cheese van
NT milk tank wagon
NT milk tanker wagon
NT milk van
NT road-rail milk tank wagon


milk tank wagon
A railway vehicle dedicated to the carriage of milk in bulk.
Literary warrant required.
Plural form: milk tank wagons

CL Vehicles and vehicle components
BT <milk and dairy product carrying vehicles>


milk tanker wagon
A flat railway vehicle dedicated to the conveyance of road trailers for milk.
Literary warrant required.
Plural form: milk tanker wagons

CL Vehicles and vehicle components
BT <milk and dairy product carrying vehicles>


milk train
Scope note required.
Literary warrant required.
Plural form: milk trains

CL Vehicles and vehicle components
BT perishable traffic train


milk van
A railway van for transporting milk in churns.
Warrant: An Illustrated History of Midland Wagons Vol.2, R J Essery, Oxford Publishing Company, 1980
Plural form: milk vans

CL Vehicles and vehicle components
BT <milk and dairy product carrying vehicles>


mill roll wagon
A railway vehicle dedicated to the carriage of rolls for the rolling of iron and steel.
Literary warrant required.
Plural form: mill roll wagons

CL Vehicles and vehicle components
BT <machinery, etc. carrying vehicles>


Mills C3R clip fastening
A flat bottom rail fastening spring steel clip.
Warrant: British Railway Track: Design, Construction and Maintenance, C L Heeler (Ed ), The Permanent Way Institution, 5th Edition, 1979 p68
Plural form: Mills C3R clip fastenings

CL Track and track components
BT rail clip (track fastening)


mine railway
An industrial railway serving a coal mine.
Warrant: British Small Mines (North), A J Booth, Industrial Railway Society, 2000
Plural form: mine railways

CL Railway types
BT mineral railway
NT lead mine railway


<mineral carrying vehicles>
Railway vehicles dedicated to the carriage of mineral traffic.
Plural form: <mineral carrying vehicles>

CL Vehicles and vehicle components
BT <rolling stock by load or function>
NT alumina wagon
NT china clay wagon
NT coal wagon
NT covered hopper wagon
NT mineral wagon
NT salt wagon
NT soda ash wagon
NT stone wagon
NT sulphate wagon


mineral empties train
Scope note required.
Literary warrant required.
Plural form: empty wagon trains

CL Vehicles and vehicle components
BT empty wagon train


mineral railway
Scope note required.
Warrant: Mineral Railways of the West Country, T Fairclough & E Shepherd, D Bradford Barton Ltd, 1975
Plural form: mineral railways

UF extractive railway
CL Railway types
BT industrial railway
NT brickworks railway
NT colliery railway
NT mine railway
NT peat railway
NT quarry railway


mineral wagon
vehicle purpose designed for the conveyance of minerals, particularly coal, iron ore etc.
Warrant: Encyclopedia of Railways, O S Nock, 1977
Plural form: mineral wagons

CL Vehicles and vehicle components
BT <mineral carrying vehicles>


miniature arm
An arm of a semaphore signal which is smaller than a main arm controlling other than running movements.
Warrant: The History & Development of Railway Signalling in the British Isles, Friends of the National Railway Museum
Plural form: miniature arms

CL Control and communications
BT signal arm


miniature lever frame
An interlocking frame with very small levers controlling power signalling.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: miniature lever frames

CL Control and communications
BT power frame


miniature locomotive
A locomotive built primarily to be miniature version, or model, powered by the same method as its 'full size' original.
Literary warrant required.
Plural form: miniature locomotives

CL Vehicles and vehicle components
BT <locomotives by scale>


miniature railway
A passenger-carrying railway of any gauge between 3 inches and 15 inches operated with locomotives that are models of real or imaginary full size types from one eighth full size upwards.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: miniature railways

CL Railway types
BT <railways by scale>
NT garden railway
RT leisure railway


miniature red/green warning light
Small red and green warning lights at minor level crossings, operated by approaching trains for the guidance of road users.
Warrant: BR Signalling Handbook, Stanley Hall, Ian Allan, 1992 p80
Plural form: miniature red/green warning lights

CL Control and communications
BT <level crossing user warning equipment>


miniature repeat ticket
Scope note required.
Literary warrant required.
Plural form: miniature repeat tickets

CL Commercial records and equipment
BT <tickets by print features>


minimum gauge railway
A railway built to 15 inch gauge which is generally considered to be the minimum practical gauge for useful haulage purposes.
Warrant: Fifteen Inch Gauge Railways, D Mosley & P Van Zeller, David & Charles, 1986
Plural form: minimum gauge railways

CL Railway types
BT <railways by gauge>
RT miniature railway


mixed traffic locomotive
A locomotive designed to pull both freight and passenger vehicles. Usually fitted with continuous brakes.
Warrant: Modern Locomotive Design Bowen Cooke 1910
Plural form: mixed traffic locomotives

CL Vehicles and vehicle components
BT <locomotives by intended load>


mixed train
A train comprising both passenger and freight vehicles.
Literary warrant required.
Plural form: mixed trains

CL Vehicles and vehicle components
BT passenger train


model locomotive
A scaled down locomotive built primarily to look like a miniature version of the real thing.
Literary warrant required.
Plural form: model locomotives

CL Vehicles and vehicle components
BT <locomotives by scale>


model railway
A railway of any gauge below 7 1/4in (18.4cm) which is a model of a real or imaginary full size system.
Literary warrant required.
Plural form: model railways

CL Railway types
BT <railways by scale>
RT leisure railway
RT model locomotive


mogul locomotive
A steam locomotive with a 2-6-0 wheel arrangement.
Warrant: Locomotive Cyclopedia of American Practice, 13th Edition, 1947
Plural form: mogul locomotives

CL Vehicles and vehicle components
BT six coupled locomotive


monitor swap switch
Scope note required.
Literary warrant required.
Plural form: monitor swap switches

CL Unidentified
BT <unidentified terms>


monobloc crossing
A one piece cast manganese steel crossing able to withstand grater wear than a built-up vee crossing.
Warrant: British Railway Track: Design, Construction and Maintenance, C L Heeler (Ed), The Permanent Way Institution, 5th Edition, 1979 p99
Plural form: monobloc crossings

CL Track and track components
BT <crossing rails>


monobloc wheel
A railway wheel cast in a single bloom and machined to the required profile.
Warrant: Railway Technical Web Pages, Piers Connor, 2000
Plural form: monobloc wheels

CL Vehicles and vehicle components
BT disc wheel


monocoque body
A vehicle structure with underframe and body designed to form a single unit on aircraft construction priniciples.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: monocoque bodies

CL Vehicles and vehicle components
BT body


monorail
A railway system where the track consists of a single rail.
Warrant: Encyclopedia of Railways, O S Nock, 1977
Plural form: monorails

CL Railway types
BT <railways by form>
NT Brennan monorail
NT Lartigue monorail
NT Palmer monorail


monorail locomotive
A locomotive designed to run on a single rail (sometimes with the help of subsidiary guide rails).
Warrant: Hunslet Engine Company Catalogues
Plural form: monorail locomotives

CL Vehicles and vehicle components
BT <locomotives by gauge>
NT Lartigue monorail locomotive


motion
The pistons, connecting rods and valve gear of a steam locomotive.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: motions

CL Vehicles and vehicle components
BT <power transmission components>


motion bracket
A bracket mounted on the locomotive frames behind the cylinders supporting the ends of the slide bars and valve spindles.
Warrant: Great Western Railway Drawing Registers
Plural form: motion brackets

CL Vehicles and vehicle components
BT valve gear component


motion plate
A large bracket attached to the locomotive frame to support parts of the valve gear.
Warrant: Railway Technical Web Pages, Piers Connor, 2000
Plural form: motion plates

CL Vehicles and vehicle components
BT <locomotive frame assemblies>


motive power depot
A depot for stabling, servicing and maintaining locomotives.
Warrant: Locomotive Running Shed Notes, Locomotive Publishing Company, undated.
Plural form: motive power depots

UF locomotive depot
CL Built works and components
BT <vehicle stabling and servicing complexes>
RT <MPD structures>


<motive power stabling and servicing structures>
Buildings and other structures connected with the housing, maintenance and repair of locomotives and other forms of motive power.
Plural form: <motive power stabling and servicing structures>

CL Built works and components
BT <vehicle stabling and servicing structures>
NT coal stage
NT coaling stage
NT coaling tower
NT engine house (loco shed)
NT engine shed
NT kettle
NT water column
NT water crane
NT water tower
RT motive power depot


motor and wheelset
Scope note required.
Literary warrant required.
Plural form: motor and wheelsets

CL Vehicles and vehicle components
BT <wheel assemblies>
RT electric traction motor


motor bogie
A bogie having driving wheels or motored axles.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: motor bogies

CL Vehicles and vehicle components
BT bogie


motor car van
A railway van with end doors designed for transporting motor cars.
Warrant: GWR Freight Wagons and Loads in service on the Great Western Railway and British Rail, Western Region, J H Russell, Oxford Publishing Company, 1981 fig78-83 Warrant: A History of GWR Goods Wagons, A G Atkins, W Beard et al, David & Charles, 2nd Edn, 1986 p118
Plural form: motor car vans

CL Vehicles and vehicle components
BT <road vehicle carrying stock>


motor coach
A passenger vehicle in a multiple unit train which is provided with traction power equipment.
Warrant: Lexique General de Termes Ferroviares, Union Internationale des Chemins de Fer, 1975
Plural form: motor coaches

CL Vehicles and vehicle components
BT <multiple units by power>


motor generator set
An electric motor and generator mechanically coupled for the purpose of converting direct current from one voltage to another.
Warrant: Encyclopedia of Railways, O S Nock, 1977
Plural form: motor generator sets

CL Vehicles and vehicle components
BT <traction current transmission components>


motor nose
An integral part of the motor casing used to secure the motor to the bogie frame via a motor nose linkage (used on axle hung motors only).
Warrant: LUL Jargon Buster
Plural form: motor noses

CL Vehicles and vehicle components
BT <electric motor components>


motor nose linkage
A resilient mounting arrangement, used to transmit motor torque to the bogie.
Warrant: LUL Jargon Buster
Plural form: motor nose linkages

CL Vehicles and vehicle components
BT <electric motor components>


motor parcel van
A self-propelled parcels van.
Warrant: The British Railcar, AEC to HST, R M Tufnell, David & Charles, 1984
Plural form: motor parcel vans

USE motor parcels van
CL Vehicles and vehicle components
BT single unit stock


motor parcels van
A self-propelled parcels van.
Literary warrant required.
Plural form: motor parcels vans

UF motor parcel van
CL Vehicles and vehicle components
BT single unit stock


motor transmission
Scope note required.
Literary warrant required.
Plural form: motor transmissions

CL Vehicles and vehicle components
BT <power transmission components>


motorised flap unit
Scope note required.
Literary warrant required.
Plural form: motorised flap units

CL Unidentified
BT <unidentified terms>


mould for thermit welding
A ceramic mould that is fitted round the ends of two lengths of rail into which thermit welding compound is poured in order to join the rails.
Literary warrant required.
Plural form: moulds for thermit welding

CL Tools and equipment
BT track laying equipment


mountain locomotive (environment)
A locomotive designed to pull vehicles up steep inclines.
Warrant: Modern Locomotive Design Bowen Cooke 1910
Plural form: mountain locomotives (environment)

CL Vehicles and vehicle components
BT <locomotives by operating environment>
RT rack locomotive


mountain locomotive (wheel arrangement)
A steam locomotive with 4-8-2 wheel arrangement.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: mountains locomotive (wheel arrangement)

CL Vehicles and vehicle components
BT eight coupled locomotive


mountain railway
A specialised form of railway for ascending mountains.
Warrant: Encyclopedia of Railways, O S Nock, 1977
Plural form: mountain railways

CL Railway types
BT <railways by location>


mounting board
Scope note required.
Literary warrant required.
Plural form: mounting boards

CL Unidentified
BT <unidentified terms>


mud ring
The base upon which the firebox is built joining the outer and inner firebox shells and sealing the water space around the inner firebox.
Warrant: Railway Technical Web Pages, Piers Connor, 2000
Plural form: mud rings

USE foundation ring
CL Vehicles and vehicle components
BT firebox component


muffled pop safety valve
Scope note required.
Literary warrant required.
Plural form: muffled pop safety valves

CL Vehicles and vehicle components
BT safety valve


multi journey ticket
A ticket valid for a number of journeys.
Literary warrant required.
Plural form: multi journey tickets

CL Commercial records and equipment
BT <travel tickets by number of journeys>


multiple collection locomotive
A locomotive which collects it electric power from more than one device ie more than one pantograph or more than shoe-beam.
Warrant: Electric Locomotives and Their Development, Henry Greenly pp1-38
Plural form: multiple collection locomotives

CL Vehicles and vehicle components
BT <electric locomotives by current collection>
RT dual voltage locomotive


multiple contact switch
An electrical switch affecting interlocking between signal levers.
Warrant: Ray Towell, Curator of Operations, National Railway Museum
Plural form: multiple contact switches

CL Unattributed
BT <unattributed>


multiple unit
An electric or diesel powered train in which the motive power is distributed over a number of car axles instead of being concentrated in a locomotive or power car.
Warrant: The Railway Dictionary, An A-Z of Railway Terminology, Alan A Jackson, Alan Sutton Publishing, 1996
Plural form: multiple units

CL Vehicles and vehicle components
BT <complete units>
NT diesel multiple unit


multiple unit car
Scope note required.
Literary warrant required.
Plural form: multiple unit cars

CL Vehicles and vehicle components
BT <individual multiple unit vehicles>


multiple unit stock
Scope note required.
Literary warrant required.
Plural form: multiple unit stock

CL Vehicles and vehicle components
BT <self-propelled stock by formation>
NT <complete units>
NT <individual multiple unit vehicles>


<multiple units by control>
Scope note required.
Plural form: <multiple units by control>

CL Vehicles and vehicle components
BT <individual multiple unit vehicles>
NT reversible unit


<multiple units by coupling arrangements>
Scope note required.
Plural form: <multiple units by coupling arrangements>

CL Vehicles and vehicle components
BT <individual multiple unit vehicles>
NT uncoupling car


<multiple units by power>
Scope note required.
Plural form: <multiple units by power>

CL Vehicles and vehicle components
BT <individual multiple unit vehicles>
NT motor coach
NT power car
NT trailer car


multiple-aspect signal
A colour light signal that can display more than two aspects.
Literary warrant required.
Plural form: multiple-aspect signals

CL Control and communications
BT <colour light signals by number of aspects>
NT four aspect signal
NT three aspect signal


multiplier
Scope note required.
Literary warrant required.
Plural form: multipliers

CL Unidentified
BT <unidentified terms>


multi-coupon ticket
Scope note required.
Literary warrant required.
Plural form: multi-coupon tickets

CL Commercial records and equipment
BT <tickets by print features>


multi-lamp route indicator
A type of alphanumeric route indicator, normally used in conjunction with main signals which comprises a matrix of lamps which, when illuminated, display individual characters.
Warrant: The History & Development of Railway Signalling in the British Isles, Friends of the National Railway Museum
Plural form: multi-lamp route indicators

CL Control and communications
BT route indicator


multi-tube boiler
A boiler containing a number of tubes that allowed the hot gases from the fire to pass through the boiler to the chimney at the other end, leading to a more even distribution of the heating effect and to more efficient steam production.
Warrant: Railway Technical Web Pages, Piers Connor, 2000
Plural form: multi-tube boilers

CL Vehicles and vehicle components
BT boiler


munitions railway
A railway for transporting munitions.
Literary warrant required.
Plural form: munitions railways

CL Railway types
BT military railway


0-9, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, [Contents]


© Collections Trust 2002.
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