Source : Webster's Revised Unabridged Dictionary (1913)

Jerboa \Jer*bo"a\, n. [Ar. yarb?'.] (Zo["o]l.)
   Any small jumping rodent of the genus {Dipus}, esp. {D.
   [AE]gyptius}, which is common in Egypt and the adjacent
   countries. The jerboas have very long hind legs and a long
   tail. [Written also {gerboa}.]

   Note: The name is also applied to other small jumping
         rodents, as the {Pedetes Caffer}, of the Cape of Good
         Hope.

   {Jerboa kangaroo} (Zo["o]l.), small Australian kangaroo
      ({Bettongia penicillata}), about the size of a common
      hare.

Source : WordNet®

jerboa
     n : mouselike jumping rodent