tachometer Hear it!

tachometer definition

ta·chom·eter (ta käm′ət ər, tə-)

noun

a device that indicates or measures the rate of rotation of a revolving shaft

Etymology: < Gr tachos, speed (< tachys: see tachy-) + -meter

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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