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Webster 1913 Edition

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Noun.

;

pl.

Pildia

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[NL., fr. Gr. [GREEK], dim. of [GREEK] 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.

pilidium ‎(plural pilidia)

(zoology) 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.