Euclīdes, is, m., = Εὐκλείδης, a Greek proper name, Euclid. A philosopher of Megara, a disciple of Socrates and founder of the Megaric sect, Cic. Ac. 2, 42, 129; Gell. 6, 10, 10; Sid. Carm. 2, 176.
— A mathematician in Alexandria under Ptolemy Philadelphus, Cic. de Or. 3, 33, 132.