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tach
tacheometry
tachina fly
tachinid
tachism
tachistoscope
tachogram
tachograph
tachometer
tachy-
tachyarrhythmia
tachycardia
tachygraphy
tachylite
tachymetry
tachyon
tachypnea
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tachometer

ta·chom·e·ter [ ta kómmətər ] (plural ta·chom·e·ters)


noun 
Definition:
 
device for measuring rotation speed: a device used to determine speed of rotation, typically of a vehicle's crankshaft, usually measured in revolutions per minute

[Early 19th century. < Greek takhos "speed"]

tach·o·met·ric [ tàkə méttrik ] adjective
tach·o·met·ri·cal·ly adverb
ta·chom·e·try noun
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