petrifactive

from The Collaborative International Dictionary of English v.0.48

Petrifactive \Pet`ri*fac"tive\, a.
   1. Having the quality of converting organic matter into
      stone; petrifying.
      [1913 Webster]

   2. Pertaining to, or characterized by, petrifaction.
      [1913 Webster]

            The . . . petrifactive mutations of hard bodies.
                                                  --Sir T.
                                                  Browne.
      [1913 Webster]