an external abdominal pouch in most marsupials where newborn offspring are suckled
例句
Many species have a pouch (marsupium), a fold of skin covering the nipples on the mother's lower belly, where the young continue their development. 许多品种都有一个育儿袋（marsupium），是在母体下腹盖住乳头的皮袋，幼体在袋内继续发育。
Of or relating to a marsupium. 育儿袋的育儿袋的或与育儿袋有关的
Pterocarpus marsupium Roxb. [医] 囊状紫檀(奇诺的原植物)
mammals of which the females have a pouch (the marsupium) containing the teats where the young are fed and carried. 哺乳动物的一种，其雌性动物有一个内长乳头并在其中喂养和携带幼子的袋子。
mammals of which the females have a pouch (the marsupium) containing the teats where the young are fed and carried 哺乳动物的一种，其雌性动物有一个内长乳头并在其中喂养和携带幼子的袋子
