Opisthorchis
noun
Op·is·thor·chis
| \ ˌäp-əs-ˈthȯr-kəs
\
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Medical Definition of Opisthorchis
: a genus of trematode worms of the family Opisthorchiidae including two (O. felineus and O. viverrini) that are parasites of the human liver acquired especially by eating raw or undercooked infected freshwater fish