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.
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

tachometer ta·chom·e·ter (tā-kŏm’ĭ-tər, tə-)
An instrument used to measure the rotations per minute of a rotating shaft.


Read Also:

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    noun a fear of speed Word Origin Greek tacho- ‘speed’

  • Tachy-

    1. a combining form meaning “swift,” used in the formation of compound words: tachygraphy. combining form 1. swift or accelerated: tachycardia, tachygraphy, tachylyte, tachyon, tachyphylaxis tachy- pref. Rapid; accelerated: tachycardia.

  • Tachyarrhythmia

    tachyarrhythmia tach·y·ar·rhyth·mi·a (tāk’ē-ə-rĭð’mē-ə) n. An excessively rapid heartbeat accompanied by arrhythmia.

  • Tachycardia-bradycardia syndrome

    tachycardia-bradycardia syndrome n. A syndrome characterized by alternating periods of slow and rapid heartbeat.

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