/mahr sooh"pee euhl/
n.
1. 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.
2. pertaining to, resembling, or having a marsupium.
3. of or pertaining to the marsupials.
[ 1690-1700; marsupialis pertaining to a pouch. See MARSUPIUM, -AL 1 ]