( n. pl. )
An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.
( n. pl. )
An extensive artificial division of gastropod mollusks, including those that breathe by gills, as contrasted with the Pulmonifera.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012