—n. any viviparous, nonplacental mammal of the order Marsupialia, comprising the opossums, kangaroos, wombats, and bandicoots, the females of most species having a marsupium containing the mammary glands and serving as a receptacle for the young.
—adj. 1. pertaining to, resembling, or having a marsupium.
2. of or pertaining to the marsupials.