1: Pertaining to the procedure of turning organic matter into stone: Wood, which has gone through a petrifactive transaction, contains large amounts of minerals from the groundwater and requires about 10,000 years to take place.
2: Descriptive of the potential of changing a substance into a rock: Fossils have gone through petrifactive processes and are quite similar to the original species, except that the pores or open spaces are completely filled with minerals.