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Meaning of skeleton car

skel'eton car"

Pronunciation: [key]
— Railroads. Railroads.
  1. a freight car essentially consisting of a central longitudinal girder fastened to the trucks, sometimes supplemented by one or more pairs of cross cantilevers: used for carrying logs or containers.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.