H[ae]madromograph

from The Collaborative International Dictionary of English v.0.48

Haemadromograph \H[ae]m`a*drom"o*graph\ (-dr[o^]m"[-o]*gr[.a]f),
   n. [H[ae]ma- + Gr. dro`mos course + -graph.] (Physiol.)
   An instrument for registering the velocity of the blood.
   Haemadynameter