セルカリアalso: ケルカリアセルカリアMeanings1nouncercariazoologyA larval stage of trematode parasites, typically free-swimming and infective to the next host. Used in zoology and parasitology contexts.from Latinセルカリアは水すい中ちゅうを泳およいで次つぎの宿しゅく主しゅを探さがす。Cercariae swim in water to find the next host.