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An external abdominal pouch in most marsupials where newborn offspring are suckled.The pouch of a marsupial animal.marsupium

(Science: anatomy) Origin: L, a pouch], The pouch, formed by a fold of the skin of the abdomen, in which marsupials carry their young; also, a pouch for similar use in other animals, as certain crustacea.

The pecten in the eye of birds and reptiles. See pecten.