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Medical Definition of Metagonimus
1. A genus of flukes (superfamily Heterophypoidea) that encyst on fish and infect various fish-eating animals, including humans. Metagonimus yokogawai, an intestinal fluke widely distributed in the Far East and the Balkans and one of the smallest (1-2.5 mm) flukes infecting humans, is passed from Semisulcospira snails to cyprinoid fish and then to man and other fish-eating mammals and birds. Origin: meta-+ G. Gonimos, productive (05 Mar 2000)