( n. pl. )
A division of opisthobranchiate mollusks, having no shell except while very young. The gills are naked and situated upon the back or sides. See Ceratobranchia.
( n. pl. )
A division of opisthobranchiate mollusks, having no shell except while very young. The gills are naked and situated upon the back or sides. See Ceratobranchia.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012