I. A fountain in Arcadia, the icy-cold water of which caused death, Plin. 2, 103, 106, § 231; Sen. Q. N. 3, 25, 1; Vitr. 8, 3, 16; Just. 12, 14, 7; Curt. 10, 10, 17.—
II. In mythology, a river in the infernal regions, by which the gods swore, Cic. N. D. 3, 17, 43; Verg. G. 4, 480; Ov. M. 12, 322; id. A. A. 1, 635; Sil. 13, 570; Stat. Th. 8, 30; id. Achill. 1, 269 al.— Hence, poet., the infernal regions, the lower world, Verg. G. 1, 243; Ov. M. 10, 13; id. P. 4, 8, 60; id. Tr. 5, 2, 74; Mart. 4, 60, 4; and for poison: “miscuit undis Styga Sidoniis,” Sen. Oedip. 163.—Hence,
1. Stygĭus , a, um, adj., of or belonging to the Styx, Stygian; and poet., of or belonging to the lower world, infernal: “palus,” Verg. A. 6, 323: “aquae,” id. ib. 6, 374: “torrens,” Ov. M. 3, 290: “cymba,” i. e. of Charon, Verg. G. 4, 506; so, “carina,” id. A. 6, 391: “Juppiter,” i. e. Pluto, id. ib. 4, 638; cf. id. ib. 6, 252: “frater,” id. ib. 9, 104: “Juno,” i.e. Proserpine, Stat. Th. 4, 526: “canes,” Luc. 6, 733: “manes,” Val. Fl. 1, 730: “umbrae,” Ov. M. 1, 139.—Hence, poet., deadly, fatal, pernicious, awful, etc.: “vis,” Verg. A. 5, 855; cf. “nox,” i. e. death, Ov. M. 3, 695: “bubo,” id. ib. 15, 791 et saep.—*