'Cercaria' definitions:

Definition of 'cercaria'

From: WordNet
noun
Tadpole-shaped parasitic larva of a trematode worm; tail disappears in adult stage

Definition of 'Cercaria'

From: GCIDE
  • Cercaria \Cer*ca"ri*a\, n.; pl. Cercarle [NL., fr. Gr. ke`rkos tail.] (Zool.) The larval form of a trematode worm having the shape of a tadpole, with its body terminated by a tail-like appendage. [1913 Webster]