Se"nile (?), a. [L. senilis, from
senex, gen. senis, old, an old man: cf. F.
sénile. 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.