περίπτυξις
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
English (LSJ)
εως, ἡ,
A folding oneself round, embracing, τοῦ νεκροῦ Plu.Cat.Mi.11 (pl.); περιπτύξεις καὶ ἁφαί Plot.4.7.8.