- any of various instruments for measuring or indicating velocity or speed, as of a machine, a river, or the blood.
- an instrument measuring revolutions per minute, as of an engine.
Origin of tachometer
Examples from the Web for tachometer
Historical Examples of tachometer
His clock and his tachometer assured him that he was well past Easton.
He watched his tachometer, which indicated his revolutions per minute.
I guess the first thing that Lindy watched was the tachometer.Famous Flyers
David Goodger (email@example.com)
There is a gear which serves to drive the magnetos and tachometer, also the air pump.Aviation Engines
Victor Wilfred Pag
A tachometer was also employed to observe the number of turns that the screw was making in a minute.Artificial and Natural Flight
Hiram S. Maxim
- any device for measuring speed, esp the rate of revolution of a shaft. Tachometers (rev counters) are often fitted to cars to indicate the number of revolutions per minute of the engine
1810, from Greek tachos "speed" + -meter.
- An instrument used to measure the rotations per minute of a rotating shaft.