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Medical Definition of Cercomonas
1. A genus of freshwater and coprophilic protozoan flagellates in which members have one anterior and one posterior flagellum. Species have been described from the intestine or faeces of man and several types of domestic livestock, but have usually proved to be other genera such as Trichomonas or Chilomastix. Origin: G. Kerkos, tail + monas (monad-), unit, monad (05 Mar 2000)