退たい行こう性せい

noun which may take the genitive case particle 'no'

degenerative; regressive; retrogressive

Medical/technical term describing a condition or process that involves deterioration or a return to a less developed state. Often used in compound phrases like 退行性変化 (degenerative change) or 退行性疾患 (degenerative disease).

• 加か齢れいに伴ともなう退たい行こう性せいの変へん化かが関かん節せつに見みられる。

  Degenerative changes associated with aging are seen in the joints.

• この病びょう気きは退たい行こう性せいの神しん経けい疾しっ患かんに分ぶん類るいされる。

  This disease is classified as a degenerative neurological disorder.