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.

Jumping \Jump"ing\, p. a. & vb. n.
   of {Jump}, to leap.

   {Jumping bean}, a seed of a Mexican {Euphorbia}, containing
      the larva of a moth ({Carpocapsa saltitans}). The larva by
      its sudden movements causes the seed to roll to roll and
      jump about.

   {Jumping deer} (Zo["o]l.), a South African rodent ({Pedetes
      Caffer}), allied to the jerboa.

   {Jumping jack}, a toy figure of a man, jointed and made to
      jump or dance by means of strings.

   {Jumping louse} (Zo["o]l.), any of the numerous species of
      plant lice belonging to the family {Psyllid[ae]}, several
      of which are injurious to fruit trees.

   {Jumping mouse} (Zo["o]l.), North American mouse ({Zapus
      Hudsonius}), having a long tail and large hind legs. It is
      noted for its jumping powers. Called also {kangaroo
      mouse}.

   {Jumping mullet} (Zo["o]l.), gray mullet.

   {Jumping shrew} (Zo["o]l.), any African insectivore of the
      genus {Macroscelides}. They are allied to the shrews, but
      have large hind legs adapted for jumping.

   {Jumping spider} (Zo["o]l.), spider of the genus {Salticus}
      and other related genera; one of the Saltigrad[ae]; -- so
      called because it leaps upon its prey.