Jūlius (in poets also Iūlius, quadrisyll.), a, adj., name of a Roman gens; especially celebrated, C. Julius Caesar and his adopted son, C. Julius Caesar (Octavianus) Augustus: unde domus Teucros Julia tangit avos, Ov. F. 4, 40: templa, i. e. curia Julia, id. P. 4, 5, 21: leges, Cic. Balb. 8; id. Sest. 64: edicta, decrees and laws of Augustus, Hor. C. 4, 15, 22: sidus, id. ib. 1, 12, 47.

— Transf.: Julius mensis (or, absol., Julius), the month of July, which was previously called Quinctilis: fervens Julius, Mart. 10, 62.