Thĕtis, ĭdis, or ĭdos (abl. also Theti;
I v. the foll.; ante-class. collat. form Thĕlis , Enn. ap. Varr. L. L. 7, § 87 Müll., or Trag. v. 431 Vahl.; cf.: antiqui ut Thetin Thelim dicebant, sic Medicam Melicam vocabant, Varr. R. R. 3, 9, 19), f., = Θέτις, a sea-nymph , daughter of Nereus and Doris , wife of Peleus , and mother of Achilles , Plaut. Truc. 4, 2, 17; Hyg. Fab. 54; 244; Ov. M. 11, 221 sq.; 11, 400; Cat. 64, 21; Hor. C. 1, 8, 14; 4, 6, 6 al.; abl. Thetide, Hor. Epod. 13, 12: Theti, Plaut. Ep. 1, 1, 33; Lact. 1, 11, 9; cf. Prisc. p. 709.—
II Transf., appel., the sea (poet. and in post-Aug. prose): temptare Thetin ratibus, Verg. E. 4, 32: hic summa levi stringitur Thetis vento, Mart. 10, 30, 11; Claud. Rapt. Pros. 1, 148: lapilli Thetidis, pearls , Stat. S. 4, 6, 18; and, hyperbol., of a large bath , Mart. 10, 13, 4.