Strong's Greek #4420
πτερύγων

Englishman's Concordance (References)

πτερύγων pterygōn — 1 Occurrence

Revelation 9:9 - N-GFP
GRK:φωνὴ τῶν πτερύγων αὐτῶν ὡς
NAS: and the sound of their wings was like
KJV: of their wings [was] as
INT: sound of the wings of them [was] as