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Meaning of Roadrailer

Road•rail•er

Pronunciation: (rōd'rā"lur), [key]
— Trademark. Trademark.
  1. a combination trailer truck and railroad car with two sets of retractable wheels, one steel, the other rubber, making possible bimodal transportation on rails and highways.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.