semiorbis

ἡγούμενος τῶν ἡδονῶν ἀλλ' οὐκ ἀγόμενος ὑπ' αὐτῶν → of his pleasures he was the master and not their servant

Latin > English (Lewis & Short)

sēmĭ-orbis: is, m.,
I a half-circle, semicircle, Sen. Q. N. 1, 8, 4; Amm. 20, 3, 10; 22, 8, 5.