( n. pl. )
An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike.
( n. pl. )
An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012