An Athenian commander who, in the Peloponnesian War, took Mitylené and Lesbos (B.C. 427). On his return home an accusation was brought against him, the purport of which is not now known. Perceiving his condemnation to be certain, he stabbed himself in the presence of his judges (Thuc.iii. 18-49; Plut. Nic.6).

(Harpers Dictionary of Classical Antiquities, 1898.)