( n. )
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.
( n. )
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.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012