Senescent
Pronunciation : Se*nes"cent
Part of Speech : a.
Etymology : [L. senescent, p. pr. of senescere to grow old, incho. fr. senere to be old.]
Definition : Defn: Growing old; decaying with the lapse of time. "The night was senescent." Poe. "With too senescent air." Lowell.
Source : Webster's Unabridged Dictionary, 1913