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hem-, hema- (hēm, hem), Although U.S. spelling practice favors this abridgment of the romanized combining form haem- based on Greek haima, the diphthongal spelling must be preserved in taxonomic terms such as Haemophilus.
prefix meaning "blood": hematoma, hematophyte.
hem-, hema-, hemo- [Gr. haima, blood]
Prefixes meaning blood. The variant “haem-” is used outside the U.S.See: hemat-