Hypertext Webster Gateway: "Cercaria"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Cercaria \Cer*ca"ri*a\, n.; pl. {Cercarle} [NL., fr. Gr. ?
tail.] (Zo["o]l.)
The larval form of a trematode worm having the shape of a
tadpole, with its body terminated by a tail-like appendage.
From WordNet (r) 1.7 (wn)
cercaria
n : tadpole-shaped parasitic larva of a trematode worm; tail
disappears in adult stage
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