Celsus, an epicurean philosopher in the second century, to whom Lucian dedicated one of his compositions. He wrote a treatise against the christians, to which an answer was returned by Origen.——Cornelius, a physician in the age of Tiberius, who wrote eight books on medicine, besides treatises on agriculture, rhetoric, and military affairs. The best editions of Celsus de medicinâ are the 8vo, Leiden, 1746, and that of Vallart, 12mo, Paris, apud Didot, 1772.——Albinoyanus, a friend of Horace, warned against plagiarism, bk. 1, ltr. 3, li. 15, and pleasantly ridiculed, in the eighth epistle, for his foibles. Some of his elegies have been preserved.——Juventius, a lawyer who conspired against Domitian.——Titus, a man proclaimed emperor, A.D. 265, against his will, and murdered seven days after.

Celtæ, a name given to the nation that inhabited the country between the Ocean and the Palus Mæotis, according to some authors mentioned by Plutarch, Caius Marius. This name, though anciently applied to the inhabitants of Gaul, as well as of Germany and Spain, was more particularly given to a part of the Gauls, whose country, called Gallia Celtica, was situate between the rivers Sequana and Garumna, modernly called la Seine and la Garonne. The Celtæ seemed to receive their name from Celtus, a son of Hercules or of Polyphemus. The promontory which bore the name of Celticum is now called Cape Finisterre. Cæsar, Gallic War, bk. 1, ch. 1, &c.Mela, bk. 3, ch. 2.—Herodotus, bk. 4, ch. 49.

Celtĭbēri, a people of Spain, descended from the Celtæ. They settled near the Iberus, and added the name of the river to that of their nation, and were afterwards called Celtiberi. They made strong head against the Romans and Carthaginians when they invaded their country. Their country, called Celtiberia, is now known by the name of Arragon. Diodorus, bk. 6.—Florus, bk. 2, ch. 17.—Strabo, bk. 4.—Lucan, bk. 4, li. 10.—Silius Italicus, bk. 3, li. 339.

Celtĭca, a well-populated part of Gaul, inhabited by the Celtæ.

Celtĭci, a people of Spain. The promontory which bore their name is now Cape Finisterre.

Celtillus, the father of Vercingetorix among the Arverni. Cæsar, Gallic War, bk. 7, ch. 4.

Celtorii, a people of Gaul, near the Senones. Plutarch.

Celtoscy̆thæ, a northern nation of Scythians. Strabo, bk. 10.

Cemmĕnus, a lofty mountain of Gaul. Strabo.

Cempsi, a people of Spain at the bottom of the Pyrenean mountains. Dionysius Periegetes, li. 358.