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Roadrailer

American  
[rohd-rey-ler] / ˈroʊdˌreɪ lər /
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.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.