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Medical Definition of Pentatrichomonas
1. A genus of parasitic protozoan flagellates, formerly part of the genus Trichomonas but now separated as a distinct genus by the presence of five anterior flagella and a granular parabasal body. The species Pentatrichomonas hominis lives as a commensal in the colon of man and other primates, dogs, cats, oxen, and various rodents. Origin: penta-+ Trichomonas (05 Mar 2000)