αἰδοῖον · aidoion — LSJ
privy parts, pudenda, both of men and women, Il. 13.568, Hes. Op. 733, Heraclit. 15, Tyrt. 10.25, Hp. Aër. 9, Pl. Ti. 91b, etc.: sg., Hdt. 2.30, 48, etc., freq. in Arist., HA 493a25, al.
αἰ. θαλάσσιον a sea animal, perh. pennatula, Nic. Fr. 139, cf. Arist. HA 532b23.