potoroo

from WordNet (r) 3.0 (2006)

potoroo
    n 1: Australian rat kangaroos

from The Collaborative International Dictionary of English v.0.48

kangaroo rat \kangaroo rat\ n. (Zool.)
   A jumping rodent of the genus {Dipodomys} of the family
   {Heteromyidae}, which lives in arid regions of Mexico and the
   western U. S.
   [PJC]

   2. (Zool.) An Australian mammal of the genus {Notomys}.
      [PJC]

   3. (Zool.) a small ratlike Australian kangaroo of the genus
      {Potorous}, also called the {potoroo}.
      [PJC]

from The Collaborative International Dictionary of English v.0.48

Potoroo \Po`to*roo"\, n. (Zool.)
   Any small kangaroo belonging to {Hypsiprymnus}, {Bettongia},
   and allied genera, native of Australia and Tasmania. Called
   also {kangaroo rat}.
   [1913 Webster]