'Pilidium' definitions:
Definition of '
Pilidium
'
From:
GCIDE
Pilidium \Pi*lid"i*um\, n.; pl.
Pildia
. [NL., fr. Gr. ?, dim. of ? a cap.] (Zool.) The free-swimming, hat-shaped larva of certain nemertean worms. It has no resemblance to its parent, and the young worm develops in its interior. [1913 Webster]
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