). An Athenian philosopher, son of Eurymedon
and Potoné, a sister of Plato. He accompanied his uncle, Plato, on his third
journey to Syracuse, where he displayed considerable ability and prudence. He succeeded Plato
as president of the Academy, but was at the head of the School for only eight years (B.C.
347-339). He wrote several works, all of which are lost, in which he developed the doctrines
of his great master.