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Definition of Opisthomastigote
1. Noun. (biology) A stage in unicellular life-cycle, typically trypanosomes, where the flagellum is posterior of the nucleus, and passes through a groove in the cell body. ¹
¹ Source: wiktionary.com
Medical Definition of Opisthomastigote
1. Term now used instead of herpetomonad for the stage of development of certain insect and plant parasitizing flagellates to avoid confusion between the stage and the genus Herpetomonas. In this stage the flagellum arises from the kinetoplast located behind the nucleus and emerges from the anterior end of the organism; an undulating membrane is absent. Origin: opistho-+ G. Mastix, whip (05 Mar 2000)