LSJ
or ἐπίγυον, τό, stern-cable, Ar. Fr. 80, cf. 426; written -γυιον in Aristid. Or. 23 (42).17, Zonar., -γυον in IG2². 1611.255-8 (iv BC), Plb. 3.46.3, Harp. s.v. ἐπίγυον (v.l. ἐπόγυιον); scanned in Ar.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)