Source : Webster's Revised Unabridged Dictionary (1913)

Marsupial \Mar*su"pi*al\, a. [Cf. F. marsupial.]
   1. (Zo["o]l.) Having a pouch for carrying the immature young;
      of or pertaining to the Marsupialia.

   2. (Anat. & Zo["o]l.) Of or pertaining to a marsupium; as,
      the marsupial bones.

   {Marsupial frog}. (Zo["o]l.) See {Nototrema}.

Marsupial \Mar*su"pi*al\, n. (Zo["o]l.)
   One of the Marsupialia.

Source : WordNet®

marsupial
     adj : of or relating to the marsupials; "marsupial animals"

marsupial
     n : mammals of which the females have a pouch (the marsupium)
         containing the teats where the young are fed and carried
         [syn: {pouched mammal}]