Lexical Definition

‎πτερύγιον‎ pterýgion (pter-oog'-ee-on) pinnacle ^G:N-N
neuter of a presumed derivative of ‎πτέρυξ‎

pinnacle.

• a winglet, i.e. (figuratively) extremity (top corner)

Abbott-Smith

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, Mt 4:5, Lk 4:9.†

Abbott-Smith References

Liddell-Scott-Jones

πτερύγιον-ιον, τό,

diminutive of πτέρυξ, [Refs 4th c.BC+].

__II anything like a wing.
__II.1 in plural, fins of fish, [Refs]; of the tail-flaps of a lobster, [Refs]; of certain sea-slugs, [Refs]; fins of the sepia and other cuttle-fish, πτερύγι᾽.. σηπίας ὠπτημένα [Refs 4th c.BC+]
__II.2 horns of the horned owl, [Refs]
__II.3 end or tip of the rudder, [Refs 2nd c.AD+]; of a pole, [Refs 5th c.AD+]
__II.4 in a building, turret or battlement, or (as others) pointed roof, peak, [NT]
__II.5 flap, fold [LXX+4th c.BC+]; flap of a cuirass, [Refs 4th c.BC+]
__II.6 in the body, part of the shoulderblade, [Refs 2nd c.AD+]; of the ear, parts joining the temples,[Refs 5th c.AD+]; of the nose, parts joining the cheeks, [Refs 2nd c.AD+]
__II.7 in Medicine texts, disease of the eye when a membrane grows over it from the inner corner, [Refs 5th c.BC+]
__II.8 fleshy excrescence on the nails, [Refs 1st c.AD+]
__II.9 plural,= του ={πνεύμονος τοῦ λοβοῦ τὰ ἄκρα}, [Refs 5th c.AD+]
__II.10 plural, flanges holding the projector of a torsion-engine, [Refs 3rd c.BC+]

_{LSJ Scripture Refs: Luke.4.9 ☩ LXX.Ruth.3.9}