(Τερψίων), a Megarian, mentioned by Suidas (s. v. Σωκράτης) as one of the disciples of Socrates. Plutarch also refers to him (de Gen. Socr. p. 581a.). It is doubtless this Terpsion who is introduced by Plato as one of the interlocutors in the Theaetetus.

Another person of this name is mentioned by Athenaeus (viii. p. 337) as the first author of a γαστρολογία, giving direction as to the viands from which it was advisable to abstain. A notable impromptu verse of his is recorded : Ἦ χρὴ χελώνης ἢ φαγεῖν ἢ μὴ φαγεῖν, which actually attained to the distinction of a various reading even in antiquity.