* * *
mar·su·pi·um mär-'sü-pē-əm n, pl -pia -pē-ə an abdominal pouch formed by a fold of the skin and enclosing the mammary glands of most marsupials
* * *
mar·su·pi·um (mahr-sooґpe-əm) pl. marsuґpia [L. “a pouchâ€] 1. an external abdominal pouch or fold of skin for carrying the young; it contains the mammary glands and occurs in marsupials and the spiny anteaters. 2. a similar structure for carrying eggs or the young, as in the male sea horse. 3. scrotum.Medical dictionary. 2011.