ἑπταμήκης

ἑπτα‐μήκης κύκλος, dub. sens. in Call. Iamb. 1.126 (cf. D.S. 10.6); perh. referring to the Pythagorean harmony of the planetary spheres.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
An open-access project