The Collaborative International Dictionary of English v.0.48:

Perishable \Per"ish*a*ble\, a. [F. p['e]rissable.]
   Liable to perish; subject to decay, destruction, or death;
   as, perishable goods; our perishable bodies.
   [1913 Webster]

WordNet (r) 3.0 (2006):

perishable
    adj 1: liable to perish; subject to destruction or death or
           decay; "this minute and perishable planet"; "perishable
           foods such as butter and fruit" [ant: imperishable]
    n 1: food that will decay rapidly if not refrigerated [syn:
         perishable, spoilable]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "perishable":
   brittle, capricious, changeable, corruptible, deciduous, dying,
   ephemeral, evanescent, fading, fickle, fleeting, flitting,
   fly-by-night, flying, fragile, frail, fugacious, fugitive,
   impermanent, impetuous, impulsive, inconstant, insubstantial,
   momentary, mortal, mutable, nondurable, nonpermanent, passing,
   short-lived, subject to death, temporal, temporary, transient,
   transitive, transitory, undurable, unenduring, unstable,
   volatile