retrogression

1. n. The act of retrograding, or going backward; retrogradation. Source: opted

2. n. 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. Source: opted

3. n. passing from a more complex to a simpler biological form Source: wordnet

4. n. returning to a former state Source: wordnet

5. 1. The act of retrograding, or going backward; retrogradation. 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. Source: webster

6. Backward development; a passing from a higher to a lower stateof organization or structure, as when an animal, approachingmaturity, becomes less highly organized than would be expected fromits earlier stages or known relationship. Called also retrogradedevelopment, and regressive metamorphism. Source: adambom

7. n:100 n passing from a more complex to a simpler biological form n returning to a former state Source: ecdict

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