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Medical Definition of Trichomonas buccalis
1. A species that lives as a commensal in the mouth of humans and other primates, especially in the tartar around the teeth or in the defects of carious teeth; there is no evidence of direct pathogenesis, but it is frequently associated with pyogenic organisms in pus pockets or at the base of teeth. Synonym: Trichomonas buccalis. (05 Mar 2000)