Definitions

from The Century Dictionary.

  • An order of the class Mammalia, coextensive with the subclass Didelphia, containing implacental mammals usually provided with a marsupium or pouch for the reception and nourishment of the young; the marsupials or pouched animals.

from the GNU version of the Collaborative International Dictionary of English.

  • proper noun plural (Zoöl.) A subclass of Mammalia, including nearly all the mammals of Australia and the adjacent islands, together with the opossums of America. They differ from ordinary mammals in having the corpus callosum very small, in being implacental, and in having their young born while very immature. The female generally carries the young for some time after birth in an external pouch, or marsupium. Called also Marsupiata.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun coextensive with the subclass Metatheria

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