rōsĭo, ōnis, f. [rodo]; in medic. lang., a gnawing, corrosion, Cels. 7, 23; 5, 28, 17. In plur., Plin. 20, 14, 54, § 153: praecordiorum, id. 23, 1, 23, § 43; 28, 9, 33, § 128.