Protozoan flagellates in the family Trypanosomatidae that are parasitic in the blood of many species of domestic and wild animals and birds, and of humans; they include the genera Leishmania and Trypanosoma, several species of which are important pathogens.
[hemo- + L. flagellum, dim. of flagrum, a whip]
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Examples: glitazone, GI cocktail, etc.