σφαίρωσις
From LSJ
ἀκίνδυνοι δ' ἀρεταὶ οὔτε παρ' ἀνδράσιν οὔτ' ἐν ναυσὶ κοίλαις τίμιαι → but excellence without danger is honored neither among men nor in hollow ships
English (LSJ)
εως, ἡ,
A spherical shape, rotundity, Paul.Aeg.6.62; formation of a sphere, Simp.in Cael.543.28, Theol.Ar.19, Olymp.in Phd.p.106 N.