資料來源 : Webster's Revised Unabridged Dictionary (1913)

Senile \Se"nile\, a. [L. senilis, from senex, gen. senis, old,
   an old man: cf. F. s['e]nile. See {Senior}.]
   Of or pertaining to old age; proceeding from, or
   characteristic of, old age; affected with the infirmities of
   old age; as, senile weakness. ``Senile maturity of
   judgment.'' --Boyle.

   {Senile gangrene} (Med.), a form of gangrene occuring
      particularly in old people, and caused usually by
      insufficient blood supply due to degeneration of the walls
      of the smaller arteries.