Is, a small river falling into the Euphrates. Its waters abound with bitumen. Herodotus, bk. 1, ch. 179.——A small town on the river of the same name. Herodotus, bk. 1, ch. 179.
Isădas, a Spartan, who, upon seeing the Thebans entering the city, stripped himself naked, and with a spear and sword engaged the enemy. He was rewarded with a crown for his valour. Plutarch.
Isæa, one of the Nereides.
Isæus, an orator of Chalcis, in Eubœa, who came to Athens, and became there the pupil of Lysias, and soon after the master of Demosthenes. Some suppose that he reformed the dissipation and imprudence of his early years by frugality and temperance. Demosthenes imitated him in preference to Isocrates, because he studied force and energy of expression rather than floridness of style. Ten of his 64 orations are extant. Juvenal, satire 3, li. 74.—Plutarch, Lives of the Ten Orators.—Demosthenes.——Another Greek orator, who came to Rome, A.D. 17. He is greatly recommended by Pliny the younger, who observes that he always spoke extempore, and wrote with elegance, unlaboured ease, and great correctness.
Isamus, a river of India.
Isander, a son of Bellerophon, killed in the war which his father made against the Solymi. Homer, Iliad, bk. 6.
Isāpis, a river of Umbria. Lucan, bk. 2, li. 406.
Isar and Isara, the Isore, a river of Gaul, where Fabius routed the Allobroges. It rises at the east of Savoy, and falls into the Rhone near Valence. Pliny, bk. 3, ch. 4.—Lucan, bk. 1, li. 399.——Another called the Oyse, which falls into the Seine below Paris.
Isar and Isæus, a river of Vindelicia. Strabo, bk. 4.
Isarchus, an Athenian archon, B.C. 424.