\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.