The Collaborative International Dictionary of English v.0.48:

Disintegrate \Dis*in"te*grate\, v. t. [imp. & p. p.
   Disintegrated; p. pr. & vb. n. Disintegrating.] [L. dis-
   + integratus, p. p. of integrare to renew, repair, fr.
   integer entire, whole. See Integer.]
   To separate into integrant parts; to reduce to fragments or
   to powder; to break up, or cause to fall to pieces, as a
   rock, by blows of a hammer, frost, rain, and other mechanical
   or atmospheric influences.
   [1913 Webster]

         Marlites are not disintegrated by exposure to the
         atmosphere, at least in six years.       --Kirwan.
   [1913 Webster]