railcar(n = noun.artifact) car, railroad car, railway car - a wheeled vehicle adapted to the rails of railroad; "three cars had jumped the rails"
is a kind of wheeled vehicle
has parts: suspension, suspension system
is a member of railroad train, train
has particulars: baggage car, luggage van, cabin car, caboose, club car, lounge car, freight car, guard's van, handcar, mail car, carriage, coach, passenger car, slip carriage, slip coach, tender, van

railcar, n. a railway vehicle consisting of a single powered coach.