a Greek philosopher of Samos, one of the first who maintained that the earth revolves round the sun. He was the contemporary of Cleanthes, the successor of Zeno. The opinion ascribed to him with respect to the motion of the earth is not to be found in his only existing work, namely his Treatise of the Greatness and Distance of the Sun and Moon. It was first published at Venice in 1498; and has been reprinted at Oxford, both separately and in the 3d volume of Wallis's works.

a celebrated grammarian, much esteemed by Ptolemy Philometer, who committed to him the education of his son. He applied himself chiefly to criticism, and made a revised of Homer's poems, but in too magisterial a way; for such verses as he did not like he treated as spurious. He commented on other poets. Cicero and Horace made use of his name to express a very rigid critic.