semicirculus
From LSJ
τὴν πρὶν ἐνεσφρήγισσεν Ἔρως θρασὺς εἰκόνα μορφῆς ἡμετέρης θερμῷ βένθεϊ σῆς κραδίης → the image of my beauty that bold Love earlier stamped in the hot depths of your heart
Latin > English (Lewis & Short)
sēmĭ-circŭlus: a, um, adj.,
I semicircular: ager, Col. 5, 2, 8.—Hence, subst.: sēmĭ-circŭlus, i, m., a half-circle, semicircle (syn. semiorbis): uncus in semicirculi speciem, Cels. 7, 26, 2: ager, i. e. semicircular, Col. 5, 2, 8.
Latin > French (Gaffiot 2016)
sēmĭcircŭlus, ī, m., demi-cercle : Cels. Med. 7, 26, 2.