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3 definitions found
 for retrogression
From The Collaborative International Dictionary of English v.0.48 :

  Retrogression \Re`tro*gres"sion\, n. [Cf. F. r['e]trogression.
     See Retrograde, and cf. Digression.]
     1. The act of retrograding, or going backward;
        retrogradation.
        [1913 Webster]
  
     2. (Biol.) Backward development; a passing from a higher to a
        lower state of organization or structure, as when an
        animal, approaching maturity, becomes less highly
        organized than would be expected from its earlier stages
        or known relationship. Called also retrograde
        development, and regressive metamorphism.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  retrogression
      n 1: passing from a more complex to a simpler biological form
           [syn: degeneration, retrogression]
      2: returning to a former state [syn: regression, regress,
         reversion, retrogression, retroversion]

From Moby Thesaurus II by Grady Ward, 1.0 :

  127 Moby Thesaurus words for "retrogression":
     Brownian movement, about-face, advance, angular motion, ascending,
     ascent, axial motion, backflowing, backing, backset, backsliding,
     backward motion, backward step, career, climbing, comedown, course,
     current, debasement, decadence, decadency, declension, declination,
     decline, deformation, degeneracy, degenerateness, degeneration,
     degradation, demotion, depravation, depravedness, depreciation,
     derogation, descending, descent, deterioration, devolution,
     disenchantment, downtrend, downturn, downward mobility,
     downward motion, downward trend, drift, driftage, drop, dying, ebb,
     ebbing, effeteness, fading, failing, failure, failure of nerve,
     fall, falling-off, flight, flip-flop, flow, flux, forward motion,
     involution, lapse, loss of tone, mounting, oblique motion, ongoing,
     onrush, passage, plunging, progress, radial motion, random motion,
     reaction, recession, recidivation, recidivism, reclamation,
     reconversion, reentry, reflowing, refluence, reflux, regress,
     regression, rehabilitation, reinstatement, relapse, restitution,
     restoration, retroaction, retrocession, retroflexion,
     retrogradation, retroversion, retrusion, return, returning,
     reversal, reverse, reversion, reverting, revulsion, rising,
     rollback, run, rush, set, setback, sideward motion, sinking,
     slippage, slipping back, slump, soaring, sternway, stream,
     subsiding, throwback, traject, trajet, trend, turn, turnabout,
     upward motion, wane
  
  

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