The Collaborative International Dictionary of English v.0.48:

Disinfect \Dis`in*fect"\, v. t. [imp. & p. p. Disinfected; p.
   pr. & vb. n. Disinfecting.]
   To free from infectious or contagious matter; to destroy
   putrefaction; to purify; to make innocuous.
   [1913 Webster]

         When the infectious matter and the infectious matter
         and the odoriferous matter are one . . . then to
         deodorize is to disinfect.               --Ure.
   [1913 Webster]