Haematachometer H[ae]m`a*ta*chom"e*ter (-t[.a]*k[o^]m"[-e]*t[~e]r), n. [H[ae]ma- + Gr. tachy`s swift + -meter.] (Physiol.) A form of apparatus (somewhat different from the hemadrometer) for measuring the velocity of the blood. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Tachometer — A tachometer is an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine. The device usually displays the revolutions per minute (RPM) on a calibrated analog dial, but digital displays are increasingly… …   Wikipedia

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