#railway_locomotive__railwaylocomotive__locomotive__engine__locomotive_engine  wheeled vehicle consisting of a self-propelled engine used to draw trains along railway tracks
  supertype:  wheeled_vehicle  a vehicle that moves on wheels and usually has a container for transporting things or people
  part:  cowcatcher  footplate
  member of:  railroad_train
  subtype:  choo-choo  a child's word for locomotive
  subtype:  diesel_locomotive  a locomotive driven by a diesel engine
  subtype:  electric_locomotive  a locomotive that is powered by an electric motor
  subtype:  iron_horse  (c. 1840) an early term for a locomotive
  subtype:  pilot_engine__pilotengine  a locomotive that precedes a train to check the track
  subtype:  shunter  a small locomotive used to move cars around but not to make trips
  subtype:  steam_locomotive__steamlocomotive  a locomotive powered by a steam engine
  subtype:  switch_engine__donkey_engine  a locomotive for switching rolling stock in a railroad yard
  subtype:  tank_engine__tank_locomotive  a locomotive that carries its own fuel and water; no tender is needed
  subtype:  traction_engine  steam-powered locomotive for drawing heavy loads along surfaces other than tracks

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