Opossum

Definition

(Noun) The opossum, Didelphis marsupials, is the only marsupial found in the United States (the young are born prematurely and brought to term in the mother's marsupium, or pouch, in which she nurtures them until they are weaned.) The opossum has several relatives throughout Central and South America, but Australia has the largest number and the greatest variety of these ancient mammals, such as the koala, wallaby, wombat, kangaroo, and sugar glider.