From The Collaborative International Dictionary of English v.0.48:

Saltatory \Sal"ta*to"ry\, a. [L. saltatorius. See Saltant, and
   cf. Saltire.]
   Leaping or dancing; having the power of, or used in, leaping
   or dancing.
   [1913 Webster]

   Saltatory evolution (Biol.), a theory of evolution which
      holds that the transmutation of species is not always
      gradual, but that there may come sudden and marked
      variations. See Saltation.

   Saltatory spasm (Med.), an affection in which pressure of
      the foot on a floor causes the patient to spring into the
      air, so as to make repeated involuntary motions of hopping
      and jumping. --J. Ross.
      [1913 Webster]
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