Lewis & Short

2. uncus, a, um, adj. [1. uncus],

  1. I. hooked, bent in, crooked, curved, barbed (poet. and in post-Aug. prose; syn.: curvus, recurvus): uncus hamus, Ov. M. 15, 476; also called unca aera, id. P. 2, 7, 10: cornua (tauri), Prop. 2, 5, 19: aratrum, Verg. G. 1, 19; Ov. M. 5, 341; 7, 210; cf.: vomer aratri, Lucr. 1, 313; also called dens, Verg. G. 2, 423: pedes (harpyiae), id. A. 3, 233: ungues, Lucr. 5, 1322: manus, Verg. G. 2, 365: digiti, Col. 7, 11, 2: cauda, Ov. M. 15, 371: labrum, Lucr. 4, 588; 5, 1407.
  2. II. Transf.: unco non alligat ancora morsu, Verg. A. 1, 169: avis Minervae, i. e. with crooked beak and talons, Stat. Th. 3, 507; cf. alites, id. ib. 12, 212.