regressive metamorphism
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.

Look at other dictionaries:

  • Regressive metamorphism — Regressive Re*gress ive (r?*gr?s ?v), a. [Cf. F. r[ e]gressif.] [1913 Webster] 1. Passing back; returning. [1913 Webster] 2. Characterized by retrogression; retrogressive. [1913 Webster] {Regressive metamorphism}. (a) (Biol.) See {Retrogression} …   The Collaborative International Dictionary of English

  • Regressive — Re*gress ive (r?*gr?s ?v), a. [Cf. F. r[ e]gressif.] [1913 Webster] 1. Passing back; returning. [1913 Webster] 2. Characterized by retrogression; retrogressive. [1913 Webster] {Regressive metamorphism}. (a) (Biol.) See {Retrogression}. (b)… …   The Collaborative International Dictionary of English

  • Katabolism — Ka*tab o*lism, n. [Gr. ? down + ? to throw.] (Physiol.) Destructive or downward metabolism; regressive metamorphism; same as {catabolism} (now the more common spelling); opposed to {anabolism}. See {Disassimilation}. [1913 Webster] …   The Collaborative International Dictionary of English

  • retrograde development — 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… …   The Collaborative International Dictionary of English

  • 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… …   The Collaborative International Dictionary of English

  • epeirogeny — epeirogenic, epeirogenetic /i puy roh jeuh net ik/, adj. /ep uy roj euh nee/, n. Geol. vertical or tilting movement of the earth s crust, generally affecting broad areas of a continent. Also, epeirogenesis /i puy roh jen euh sis/, epirogeny.… …   Universalium

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