HAEMOCOEL Meaning of HAEMOCOEL in English [ 'hi:məsi:l ]( US hemocoel ) ■ noun Zoology the primary body cavity of most invertebrates, containing circulatory fluid.OriginC19: from haemo- + Gk koilos 'hollow, cavity'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004