protasis
From LSJ
τίς τὸν πλανήτην Οἰδίπουν καθ' ἡμέραν τὴν νῦν σπανιστοῖς δέξεται δωρήμασιν → who on this day shall receive Oedipus the wanderer with scanty gifts
Latin > English (Lewis & Short)
prŏtăsis: is, f., = πρότασις.
I An assertion, proposition (pure Lat. effatum), App. Dogm. Plat. p. 29.—
II The beginning or first part of a play, Don. Ter. And. praef.
Latin > French (Gaffiot 2016)
prŏtăsis, is, f. (πρότασις), protase, exposition [d’une pièce de théâtre] Don. Andr. prol. 1.