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).
加齢に伴う退行性の変化が関節に見られる。
Degenerative changes associated with aging are seen in the joints.
This disease is classified as a degenerative neurological disorder.
Antonym meaning 'progressive'; used for diseases that worsen over time, contrasting with 退行性 which implies a backward or deteriorating process.
Compound of 退行 (regression, degeneration) + 性 (-ness, nature). The exact historical derivation is uncertain; the term is used in modern medical and technical Japanese.