haemocytometerPronunciation: /ˌhiːmə(ʊ)sʌɪˈtɒmɪtə/ (US hemocytometer)Definition of haemocytometer noun an instrument for visual counting of the number of cells in a blood sample or other fluid under a microscope. haemocytometer in other Oxford dictionaries Definition of haemocytometer in the US English dictionary