ἑξάμετρος

ον
A. of six metres, ἐν ἑ. τόνῳ in hexameter measure, Hdt. 1.47; ἐν ἔπεσι ἑ. Id. 7.220, cf. Pl. Lg. 810d; ἑξάμετρα (sc. ἔπη) Arist. Rh. 1404a34, Po. 1449a27, Demetr. Eloc. 1, etc.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project