·noun Fig.: Hardness; callousness; obduracy.
II. Petrifaction ·noun The state or condition of being petrified.
III. Petrifaction ·noun That which is petrified; popularly, a body incrusted with stony matter; an Incrustation.
IV. Petrifaction ·noun The process of petrifying, or changing into stone; conversion of any organic matter (animal or vegetable) into stone, or a substance of stony hardness.