Dictionary

tachometer

tachometer

noun ta·chom·e·ter \ta-ˈkä-mə-tər, tə-\

: a device that measures how fast something (such as a wheel) is turning

Full Definition of TACHOMETER

:  a device for indicating speed of rotation

Origin of TACHOMETER

Greek tachos speed + English -meter
First Known Use: 1810

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