The Collaborative International Dictionary of English v.0.48:

Putrescible \Pu*tres"ci*ble\, a.
   Capable of putrefaction; liable to become putrid; as,
   putrescible substances.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Putrescible \Pu*tres"ci*ble\, n.
   A substance, usually nitrogenous, which is liable to undergo
   decomposition when in contact with air and moisture at
   ordinary temperatures.
   [1913 Webster]

WordNet (r) 3.0 (2006):

putrescible
    adj 1: liable to decay or spoil or become putrid [syn:
           decayable, putrescible, putrefiable, spoilable]