( n. pl. )
A class of Mollusca in which the anterior lobes of the foot are developed in the form of broad, thin, winglike organs, with which they swim at near the surface of the sea.
( n. pl. )
A class of Mollusca in which the anterior lobes of the foot are developed in the form of broad, thin, winglike organs, with which they swim at near the surface of the sea.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012