The Collaborative International Dictionary
Haemoscope
Haemoscope \H[ae]m"o*scope\ (h[e^]m"[-o]*sk[=o]p or h[=e]"m[-o]-), n. [H[ae]mo- + -scope.] (Physiol.) An instrument devised by Hermann, for regulating and measuring the thickness of a layer of blood for spectroscopic examination.
Wiktionary
haemoscope
n. An instrument for regulate and measure the thickness of a layer of blood for spectroscopic examination.