Liddell-Scott-Jones

σφενδόνη (sphendonē) a sling ^G:N-F

σφενδόνη-η, ἡ,

sling, [Refs 8th c.BC+] (where it is used as a bandage), [Refs 7th c.BC+]; σφενδόνηῃ οὐκ ἂν ἐφικοίμην αὐτόσ᾽ could not reach it with a sling, [Refs 4th c.BC+]

__2 a sling as part of a crane used in unloading ships, [Refs 4th c.BC+]: so perhaps metaphorically, σφενδόνηας ἀπ᾽ εὐμέτρου [Refs 4th c.BC+]
__II anything of like shape:
__II.1 sling for a disabled arm, [Refs 8th c.BC+]; suspensory abdominal bandage, [Refs 5th c.BC+]
__II.2 headband worn by women, broad in front, [Refs 2nd c.AD+]
__II.3 hoop of a ring in which the stone was set as in a sling, especially the outer or broader part round the stone, collet, [Refs 5th c.BC+]
__II.4 white of the eye, [Refs 2nd c.AD+]
__III stone or bullet of the sling, [Refs 5th c.BC+]; τοιαύταις σ., of hailstones, [Refs 5th c.BC+]