saxĭfĭcus, a, um, adj. [saxum-facio],
that turns into stone , petrifying (poet.): Medusa, Ov. Ib. 555; Sil. 10, 178; Luc. 9, 670; cf.: vultus Medusae, Ov. M. 5, 217: os (Medusae), Sen. Herc. Fur. 901.
saxificus adj. saxum+2 FAC-, turning into stone, petrifying : Medusa, O.: voltus Medusa...
An Elementary Latin Dictionary