backward movement.
decline or deterioration.

1545–55; < Late Latin retrōgradātiōn- (stem of retrōgradātiō), probably equivalent to Latin retrōgrad(us) retrograde + -ātiō -ation, as translation of Greek anapodismós

retrogradatory [re-truh-grey-duh-tawr-ee, -tohr-ee] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To retrogradation
World English Dictionary
retrograde (ˈrɛtrəʊˌɡreɪd)
1.  moving or bending backwards
2.  (esp of order) reverse or inverse
3.  tending towards an earlier worse condition; declining or deteriorating
4.  astronomy
 a.  Compare direct occurring or orbiting in a direction opposite to that of the earth's motion around the sun
 b.  occurring or orbiting in a direction around a planet opposite to the planet's rotational direction: the retrograde motion of the satellite Phoebe around Saturn
 c.  appearing to move in a clockwise direction due to the rotational period exceeding the period of revolution around the sun: Venus has retrograde rotation
5.  biology tending to retrogress; degenerate
6.  music of, concerning, or denoting a melody or part that is played backwards
7.  obsolete opposed, contrary, or repugnant to
8.  to move in a retrograde direction; retrogress
9.  (US) military another word for retreat
[C14: from Latin retrōgradī to go backwards, from gradi to walk, go]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Retrogradation and gel textural attributes of corn starch amylose and
  amylopectin fractions.
Bread staling was mainly due to amylopectin retrogradation.
Two mechanisms are used to solidify starch droplets: retrogradation and
Effects of critical fluid lipid extraction on the gelatinization and
  retrogradation of normal dent cornstarch.
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