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haemotachometer
haemotachometer n. 
/ˌhɛmə(ʊ)təˈkɒmᵻtə/,
Brit. /ˌhiːmə(ʊ)təˈkɒmᵻtə/
, /ˌhiːmə(ʊ)təˈkɒmᵻtə//ˌhɛmə(ʊ)təˈkɒmᵻtə/U.S. /ˌhimətəˈkɑmədər/
(erron. hæmatachometer) [Greek τάχος speed, velocity: see -meter comb. form2] an instrument for measuring the velocity of the blood-current./ˌhimətəˈkɑmədər/ΘΚΠ
the world > health and disease > healing > diagnosis or prognosis > specific measuring or recording > [noun] > specific measuring or recording instruments > for pulse or blood-flow
pulse watch1706
pulsiloge1812
sphygmometer1834
pulsimeter1842
rheometer1847
haemodromometer1857
pulsometer1858
sphygmograph1860
haemotachometer1867
haemometer1872
angiograph1877
haemodromograph1888
phlebograph1893
oscillometer1910
1867 J. Marshall Outl. Physiol. II. 228 The hæmotachometer of Vierordt.
1888 M. Foster Text Bk. Physiol. (ed. 5) 222 The Hæmatachometer of Vierordt is constructed on the principle of measuring the velocity of the current by observing the amount of deviation of a pendulum, the free end of which hangs loosely in the stream.
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