Abbott-Smith Manual Greek Lexicon
ἀκμάζω (G187)
1 ** ἀκμάζω ( ἀκμήν ), [in LXX: IV Mac 2:3 *;] to be at the prime ; of produce of the ground, to be ripe (Thuc.): Re 14:18 (MM, VGT , s.v.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain