nā̆trix, īcis (once m.: natrix violator aquae, Luc. 9, 720; usually), f. [no].
I A water-snake : cur deus tantam vim natricum viperarumque fecerit? Cic. Ac. 2 ( Luc. ), 38, 120.—
2 Trop., of a dangerous person: se natricem educare, Suet. Calig. 11.—
B Transf., a whip, scourge , made of a watersnake's skin: natibu' natricem impressit crassam et capitatam, Lucil. ap. Non. 65, 30.—
II A plant : Ononis natrix, Linn.; Plin. 27, 12, 83, § 107.