Akademik

senescence
noun
1. the property characteristic of old age
Syn: ↑agedness
Derivationally related forms: ↑senescent, ↑aged (for: ↑agedness)
Hypernyms: ↑oldness
2. the organic process of growing older and showing the effects of increasing age
Syn: ↑aging, ↑ageing
Derivationally related forms: ↑senescent
Hypernyms: ↑organic process, ↑biological process
Hyponyms: ↑catabiosis

Useful english dictionary. 2012.