ἀκμ-αῖος · akm-aios — LSJ
in full bloom, at prime, vigorous, πῶλοι A. Eu. 405; ἥβη Id. Th. 11; ἀκμαῖος φύσιν in the prime of strength, Id. Pers. 441; ἀ. τὸν ὀργήν Luc. Tim. 3; κάλλει ἀκμαία Epigr.Gr. 127; τὸ ἀκμαιότατον D.H. 5.22; ἀκμαίων λέσχη at Chalcis, Plu. Aet.Gr. 2.298d:—ἀ. πρὸς ἔρωτα AP 7.221, cf. Luc. DDeor. 13[8].2, Ael. NA 15.10. Adv. ἀκμαίως, ἔχειν κατὰ τὴν ἡλικίαν Plb. 31.29.7: Comp. -ότερον more vigorously, Gal. 4.525:—of things, at the height, ὁ ἀκμαιότατος καιρὸς τῆς ἡμέρας, i. e. noon, Plb. 3.102.1; τὸ ἀ.
Rhet., belonging to the supreme effort, culmination of oratory, ἔννοιαι, λόγος, Hermog. Id. 1.7, Inv. 4.4: Comp., Id. 1.10.
in time, in season, ἀ. καιρός PTeb. 24.56 (ii B. C., Sup.); ἀ. ἡμέραι the seasonable days, Ath. 5.180c, cf. AP 10.2 (Antip.Sid.): neut. pl. as Adv., ἀκμαἶʼ ἂν μόλοι S. Aj. 921 (cj.).