D defs.my
Entry 4 senses Webster, 1913

Degeneration

/dĭj-ĕnˌ-ẽr-āsh'-ən/ · De·gen·er·a·tion · IPA /dɪˌdʒɛnəˈɹeɪʃən/
01 n. The act or state of growing worse, or the state of having become worse; decline; degradation; debasement; degeneracy; deterioration.
  1. 1.
    The act or state of growing worse, or the state of having become worse; decline; degradation; debasement; degeneracy; deterioration.
    “Our degeneration and apostasy.” — Bates.
  2. 2.
    That condition of a tissue or an organ in which its vitality has become either diminished or perverted; a substitution of a lower for a higher form of structure; as, fatty degeneration of the liver.(Physiol.)
  3. 3.
    A gradual deterioration, from natural causes, of any class of animals or plants or any particular organ or organs; hereditary degradation of type.(Biol.)
  4. 4.
    The thing degenerated.[R.]
    “Cockle, aracus, . . . and other degenerations.” Sir T. Browne.
Phrases & compounds
Amyloid degeneration — See under Amyloid, Caseous, etc.