Retrogression

Retrogression
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]


The Collaborative International Dictionary of English. 2000.

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  • rétrogression — [ retrɔgresjɔ̃ ] n. f. • 1836; de rétro et lat. gressus, d apr. progression ♦ Didact. Mouvement, marche en arrière. ⇒ recul, rétrogradation. ⊗ CONTR. Progression. ● rétrogression nom féminin Mouvement en arrière. ⇒RÉTROGRESSION, subst. fém. A.… …   Encyclopédie Universelle

  • retrogression — index decline, degradation, deterioration, lapse (expiration), recidivism, reconversion, relapse …   Law dictionary

  • retrogression — (n.) 1640s, formed on model of progression from L. retrogressus, pp. of retrogradi move backward (see RETROGRADE (Cf. retrograde)) …   Etymology dictionary

  • retrogression — [re΄trə gresh′ən] n. 1. any retrogressing 2. Biol. a return to a lower, less complex stage or state; degeneration …   English World dictionary

  • retrogression — [[t]re̱trəgre̱ʃ(ə)n[/t]] N UNCOUNT: also a N Retrogression means moving back to an earlier and less efficient stage of development. [FORMAL] There has been a retrogression in the field of human rights since 1975. Syn: regression …   English dictionary

  • Retrogression Heat Treatment — (RHT) is a heat treatment process that rapidly heat treats age hardenable aluminum alloys. Mainly induction heating is used for RHT. In the past, it was mainly used for 6061 and 6063 aluminum alloys. Therefore, forming of complex shapes is… …   Wikipedia

  • retrogression — noun Date: 1604 1. regression 3 2. return to a former and less complex level of development or organization …   New Collegiate Dictionary

  • retrogression — /re treuh gresh euhn/, n. 1. the act of retrogressing; movement backward. 2. Biol. degeneration; retrograde metamorphosis; passing from a more complex to a simpler structure. [1640 50; < L retrogress(us) (see RETROGRESS) + ION] * * * …   Universalium

  • retrogression — noun a) A deterioration or decline to a previous state b) A return to a less complex condition See Also: retrogressive …   Wiktionary

  • retrogression — SYN: cataplasia. [L. retrogressus fr. retrogradior, to go backwards] * * * ret·ro·gres·sion .re trə gresh ən n a reversal in development or condition: as a) return to a former and less complex level of development or organization b) subsidence or …   Medical dictionary

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