Lewis & Short

1. rūga, ae, f., a crease in the face, a wrinkle.

  1. A. In gen. (class.; usu. in plur.).
        1. (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.
        2. (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.
  2. 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.
    1. 2. The female screw, Plin. 18, 31, 74, § 317.