tachometry

tachometer

[ta-kom-i-ter, tuh-]
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.

Origin:
1800–10; tacho- + -meter

tachometrically [tak-uh-me-trik-lee] , adverb
tachometry, noun
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World English Dictionary
tachometer (tæˈkɒmɪtə)
 
n
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
 
tachometric
 
adj
 
tacho'metrical
 
adj
 
tacho'metrically
 
adv
 
ta'chometry
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

tachometer
1810, from Gk. tachos "speed" + Eng. -meter, on model of barometer, etc.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

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

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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