πτερύγιον, -ου, -τό (dimin. of πτέρυξ), [in LXX chiefly for כָּנָף ;] __1. a little wing. __2. Anything like a wing, as a turret, battlement: τ. ἱεροῦ, Refs Mat.4:5, Luk.4:9.† (AS)
Thayer:
1) a wing, a little wing 2) any pointed extremity 2a) of fins of fishes 2b) of part of a dress hanging down in the form of a wing 2c) of the top of the temple at Jerusalem
πτερύγιον
pterugion
pter-oog'-ee-on
Neuter of a presumed derivative of G4420; a winglet, that is, (figuratively) extremity (top corner)