Having the quality of converting organic matter into stone; petrifying.(adjective)
Pertaining to, or characterized by, petrifaction.(adjective)
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Use "petrifactive" in a sentence
"(Protogaea, 1680), although he did not surmise how much time was needed for petrifactive processes to occur."
"Anticipating the query, I said, "And these are the huge beasts of the earth, and the cattle of the third great period of organic existence; and yonder, in the same apartment, you see, but at its further end, is the famous fossil man of Guadaloupe, locked up by the petrifactive agencies in a slab of limestone.""
"It was covered with a bark of brittle coal, which is, however, wanting in all the fragments that have been preserved; and was resolved internally into a brown calcareous substance of about the hardness of ordinary marble, and very much resembling that into which the petrifactive agencies have consolidated the fossil trees of Granton and Craigleith."