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dynamometer car

American  

noun

Railroads.

  1. a car equipped with special instruments and coupled to a locomotive to record its energy output, fuel consumption, and other data continuously during a regularly scheduled run.

Etymology

Origin of dynamometer car

First recorded in 1875–80

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.