Strong's G4419 — πτερύγιον (noun)
pterugion (pter-oog'-ee-on) n.
1. a winglet
2. (figuratively) extremity (top corner)
[neuter of a presumed derivative of G4420]
KJV: pinnacle 
Root(s): G4420 
Hebrew root: πτέρυξ
Occurrences: 2