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Webster 1913 Edition


Pilidium

‖

Pi-lid′i-um

,
Noun.
;
pl.
Pildia
(#)
.
[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.