Webster’s Revised Unabridged Dictionary · 1913
Hæmatachometer
Hæm′a·ta·chom′e·ter (- tȧ·kŏm′ē·tẽr), n. [Hæma- + Gr. ταχύς swift + -meter.] (Physiol.) A form of apparatus (somewhat different from the hemadrometer) for measuring the velocity of the blood.