I.a crease in the face, a wrinkle.
A. In gen. (class.; usu. in plur.).
(α).
Plur.: “non cani non rugae repente auctoritatem arripere possunt,” Cic. Sen. 18, 62: “vos populumque Romanum non consilio neque eloquentiā, sed rugis supercilioque decepit,” id. Red. in Sen. 7, 15: nec pietas moram Rugis et instanti senectae Afferet, Hor. C. 2, 14, 3: “vis tu remittere aliquid ex rugis,” Plin. Ep. 9, 17, 2: “rugas in fronte contrahere,” Varr. R. R. 1, 2, 26: “rugis vetus Frontem senectus exaret,” Hor. Epod. 8, 4; cf.: frontem rugis arat, * Verg. A. 7, 417: “dum tarda senectus inducat rugas,” Tib. 2, 2, 20; Hor. C. 4, 13, 11: “sulcare cutem rugis,” Ov. M. 3, 276; 14, 96; 15, 232 et saep. al.— “Prov.: de rugis crimina multa cadunt,” Ov. Am. 1, 8, 46.—
(β).
Sing. (poet.): “faceret scissas languida ruga genas?” Prop. 2, 18 (3, 10), 6; 3 (4), 25, 12; Ov. Tr. 3, 7, 34, id. A. A. 1, 240; Juv. 13, 215; 14, 325.—
B. Transf., a crease, fold, plait, wrinkle, corrugation, etc., of any kind (post-Aug.; cf. “rugo, I.): margaritae flavescunt senectā rugisque torpescunt,” Plin. 9, 35, 54, § 109: “aquilonis afflatus poma deturpans rugis,” id. 15, 16, 18, § 59; 12, 7, 14, § 26; 17, 14, 24, § 107 al.; of the folds of garments, id. 35, 8, 34, § 56; Macr. S. 2, 9.—In sing.: “jam deciens redit in rugam,” Pers. 6, 79 Gildersleeve ad loc.: “vestes quoque diutius vinctas ruga consumet,” Petr. 102, 12.—
2. The female screw, Plin. 18, 31, 74, § 317.