petrifactive
/ˌpɛtrɪˈfaktɪv/Now rare
adjective
Having the quality of petrifying; causing petrifaction.
Origin
Mid 17th century; earliest use found in Thomas Browne (1605–1682), physician and author. From petrifact- + -ive, perhaps after e.g. calefactive, putrefactive, stupefactive; compare also chylifactive, satisfactive.