autorail

noun

au·​to·​rail

variants or autorailer

" + ˌ⸗⸗

plural -s

: a self-propelled vehicle equipped with both flange wheels and pneumatic tires and thus adaptable to either railway or highway operation

Word History

Etymology

auto- entry 2 + rail or railer

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

• More than 250,000 words that aren't in our free dictionary
• Expanded definitions, etymologies, and usage notes
• Advanced search features
• Ad free!