jumping spider

from The Collaborative International Dictionary of English v.0.48
Jumping \Jump"ing\, p. a. & vb. n.
   of {Jump}, to leap.
   [1913 Webster]

   {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} (Zool.), a South African rodent ({Pedetes
      Caffer}), allied to the jerboa.

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

   {Jumping mouse} (Zool.), 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} (Zool.), gray mullet.

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

   {Jumping spider} (Zool.), spider of the genus {Salticus} and
      other related genera; one of the Saltigrad[ae]; -- so
      called because it leaps upon its prey.
      [1913 Webster]
    

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