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Definition of MARSUPIALIA
: an order or other taxon of mammals comprising kangaroos, wombats, bandicoots, opossums, and related animals that with few exceptions develop no placenta and usually have a pouch on the abdomen of the female containing the teats and serving to carry the young
—mar·su·pi·al\mär-ˈsü-pē-əl\adjective or noun
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