a combining form meaning “speed,” used in the formation of compound words:
speed: tachograph, tachometer
noun 1. the record produced by the action of a tachometer.
noun 1. a recording tachometer. 2. tachogram. noun 1. a tachometer that produces a graphical record (tachogram) of its readings, esp a device for recording the speed of and distance covered by a heavy goods vehicle Often shortened to tacho
noun 1. any of various instruments for measuring or indicating velocity or speed, as of a machine, a river, or the blood. 2. an instrument measuring revolutions per minute, as of an engine. noun 1. any device for measuring speed, esp the rate of revolution of a shaft. Tachometers (rev counters) are often fitted to […]
noun a fear of speed Word Origin Greek tacho- ‘speed’