senescence

from WordNet (r) 3.0 (2006)
senescence
    n 1: the organic process of growing older and showing the
         effects of increasing age [syn: {aging}, {ageing},
         {senescence}]
    2: the property characteristic of old age [syn: {agedness},
       {senescence}]
    
from The Collaborative International Dictionary of English v.0.48
Senescence \Se*nes"cence\, n. [See {Senescent}.]
   The state of growing old; decay by time.
   [1913 Webster]
    

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