ret·ro·gres·sion /-ˈgrɛʃən/
 倒退,退化,退步


 ret·ro·gres·sion /ˌrɛtrəˈgrɛʃən/ 名詞
 退行性,逆行性,逆行,逆向運動,反向運動,倒退,退步,衰退


 Re·tro·gres·sion n.
 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.

 ◄ ►


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