σφῆρος
From LSJ
ἡ Νέμεσις προλέγει τῷ πήχεϊ τῷ τε χαλινῷ μήτ' ἄμετρόν τι ποιεῖν μήτ' ἀχάλινα λέγειν → Nemesis warns us by her cubit-rule and bridle neither to do anything without measure nor to be unbridled in our speech
English (LSJ)
ὁ,
A horoscope, Supp.Epigr.7.370 (Dura-Europus, iii A.D.). (Later spelling of σφαῖρος.)