Source : Webster's Revised Unabridged Dictionary (1913)

Putrefactive \Pu`tre*fac"tive\, a. [Cf. putr['e]factif. See
   {Putrefy}.]
   1. Of or pertaining to putrefaction; as, the putrefactive
      smell or process. --Wiseman.

   2. Causing, or tending to promote, putrefaction. --
      {Pu``tre*fac"tive*ness}, n.

Source : WordNet®

putrefactive
     adj : causing or promoting bacterial putrefaction [syn: {putrefacient}]