HAEMATOCRIT Meaning of HAEMATOCRIT in English [ 'hi:mətə(ʊ)krɪt ]( US hematocrit ) ■ noun Physiology the ratio of the volume of red blood cells to the total volume of blood.OriginC19: from haemato- + Gk kritēs 'judge'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004