Ἰθμός

A. neck, narrow passage, esp. of the body, neck, Emp. 100.19; ἰ. καὶ ὅρος τῆς τε κεφαλῆς καὶ τοῦ στήθεος Pl. Ti. 69e: metaph., βίου βραχὺν ἰσθμόν S. Fr. 568 (lyr.).

2. pharynx, fauces, Gal. 18(2).961, Aret. SA 1.6.

II. neck of land between two seas, isthmus, ὁ ἰ. τῆς Χερσονήσου Hdt. 6.36; of Athos, Id. 7.22; Κιμμερικός A. Pr. 729; ὁ ἰ. τῆς Παλλήνης Th. 1.56; ὁ Λευκαδίων ἰ. Id. 3.81.

2. Ἰσθμός (also Ἰθμός SIG 507 (Delph., iii B.C.), cf. foreg.) ὁ(ἡ in Pi., as O. 7.81, 8.48), the Isthmus of Corinth, Hdt. 8.40, etc.; Ἰσθμοῦ δειράς, αὐχὴν Ἰσθμοῦ, Pi. I. 1.9, B. 2.7; dat. Ἰσθμῷ prob. f.l. for Ἰσθμοῖ (q.v.) in Th. 5.18, AP 13.15; but ἐν Ἰσθμῷ correctly in Hdt. 9.27,81.

3. narrow ridge, of the Caucasus, between Caspian and Euxine, Arist. Mu. 393b25, D.P. 20.

4. of the sea, strait, narrow channel, Inscr.Délos Il.cc., App. Hann. 34. (Perh.fr. εἶμι (ibo), cf. ἴθμα, εἰς‐ίθμη, and the spellings Ἰθμός (supr.), Ἰθμο‐νίκα IG 4.951.10.)