Lewis & Short

saxĭfrăgus, a, um, adj. [saxum-frango], stone-breaking, stone-crushing: undae maris, Enn. ap. Cic. de Or. 3, 42, 167 (Ann. v. 564 Vahl.): adiantum, so called because it breaks or dissolves the stone in the bladder, Plin. 22, 21, 30, § 64; also, herba, Ser. Samm. 32, 602; App. Herb. 67.
Absol. (sc. herba), Veg. 1, 13, 5; 6, 11, 1 al.