opisthorchiasis/ˌɒpɪsθɔːˈkaɪəsɪs/EtymologyFrom translingual Opisthorchis + -iasis.opisthorchiasis means A parasitic disease caused by trematodes in the genus Opisthorchis. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounA parasitic disease caused by trematodes in the genus Opisthorchis.