The Collaborative International Dictionary
Haemacytometer
Haemacytometer \H[ae]m`a*cy*tom"e*ter\ (-s[-i]*t[o^]m"[-e]*t[~e]r), n. [H[ae]ma + Gr. ky`tos a hollow vessel + -meter.] (Physiol.) An apparatus for determining the number of corpuscles in a given quantity of blood.
Wiktionary
haemacytometer
n. (alternative form of hemocytometer English)