ἐμπύριος

ον
A. belonging to the empyrean, θεός (opp. αἰθέριος, ὑλαῖος) Procl. Theol. Plat. 4.39, cf. Iamb. Myst. 7.2, Lyd. Mens. 4.22.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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