saltation

[sal-tey-shuhn]
noun
1.
a dancing, hopping, or leaping movement.
2.
an abrupt movement or transition.
3.
Geology. intermittent, leaping movement of particles of sand or gravel, as from the force of wind or running water.
4.
Biology.
a.
a sudden discontinuity in a line of descent.
b.
a mutation.

Origin:
1640–50; < Latin saltātiōn- (stem of saltātiō) a dancing, equivalent to saltāt(us) (past participle of saltāre; see saltant) + -iōn- -ion

saltational, adjective
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World English Dictionary
saltation (sælˈteɪʃən)
 
n
1.  biology an abrupt variation in the appearance of an organism, species, etc, usually caused by genetic mutation
2.  geology the leaping movement of sand or soil particles carried in water or by the wind
3.  a sudden abrupt movement or transition
 
[C17: from Latin saltātiō a dance, from saltāre to leap about]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

saltation sal·ta·tion (sāl-tā'shən, sôl-)
n.

  1. The act of leaping, jumping, or dancing.

  2. Discontinuous movement, transition, or development; advancement by leaps as of a disease or physiologic function.

  3. A single mutation that drastically alters the phenotype.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
saltation   (sāl-tā'shən, sôl-)  Pronunciation Key 
A single mutation that drastically alters the phenotype.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Saltation is downwind movement of particles in a series of jumps or skips.
The saltation source term is applied only in the control volumes adjacent to
  the solid boundaries.
Every measurement period will record a count from this signal, even when no
  saltation has occurred.
Three types of particle motion were characterized in the early wind tunnel
  experiments: suspension, saltation, and creeping.
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