third railnoun [ C ]
uk/ˌθɜːd ˈreɪl//ˌθɝːd ˈreɪl/a metal bar, running parallel with train tracks, that supplies electricity to some types of train
Thesaurus: synonyms and related words
Railways: trains & parts of trains
- air brake
 - baggage car
 - bogie
 - boiler
 - bullet train
 - choo-choo
 - coach
 - commuter train
 - couchette
 - diesel
 - emergency cord
 - freight car
 - intercity
 - maglev train
 - rolling stock
 - shunt
 - shuttle
 - sleeping car
 - truck
 - wagon-lit
 
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