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The Collaborative International Dictionary
Petrifactive

Petrifactive \Pet`ri*fac"tive\, a.

  1. Having the quality of converting organic matter into stone; petrifying.

  2. Pertaining to, or characterized by, petrifaction.

    The . . . petrifactive mutations of hard bodies.
    --Sir T. Browne.

Wiktionary
petrifactive

a. 1 Having the quality of converting organic matter into stone; petrifying. 2 Pertaining to, or characterized by, petrifaction.