Abbott-Smith Manual Greek Lexicon
πτέρυξ (G4420)
5 πτέρυξ , -υγος, ἡ ( πέτομαι ), [in LXX chiefly for כָּנָף ;] a wing : of birds, Mt 23:37 , Lk 13:34 , Re 12:14 ; of creatures seen in a vision, Re 4:8 9:9 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain