Santra
From LSJ
προγράψαντες οὖν τά τε θεωρήματα καὶ τὰ ἐπιτάγματα τὰ χρεῖαν ἔχοντα εἰς τὰς ἀποδείξιας αὐτῶν μετὰ ταῦτα γραψοῦμές τοι τὰ προκείμενα → having therefore written at the beginning the theorems and the postulates that are necessary for their proofs, we will then write out for you the propositions
Latin > English (Lewis & Short)
Santra: ae, m.,
I a famous grammarian, Quint. 12, 10, 16; Suet. Vit. Ter. 4; Paul. ex Fest. p 68 Müll.