/ Dictionary / Index D dynamometer car: Meaning and Definition of Find definitions for: dynamom'eter car" Pronunciation: [key] — Railroads. Railroads. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dynamometer dynamometry Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language