Marsupial

a. [Fr. & Sp. marsupial, It. marsupiale, from Lat. marsupium, Gr. μαρσύπιον, a pouch, bag, purse.] (Zoöl.) (a.) Having a pouch for carrying the immature young; pertaining to the group of quadrupeds characterized by a pouch or marsupium. (b.) Pertaining to the pouch of the marsupials; as, the marsupial bones. See DIDELPHYS. Dana.