1. A member of the order Marsupalia, which includes such mammals as kangaroos, wombats, bandicoots, and opossums, the female of which has an abdominal pouch for carrying the young. 2. Of or pertaining to marsupials. [L. marsupium, a pouch]
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mar·su·pi·al (mahr-sooґpe-əl) [L. marsupium a pouch] a member of the order Marsupialia.Medical dictionary. 2011.