vectatio
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
vectātĭo: ōnis, f. id.,
I a carrying or being carried, a riding (post-Aug.): vectatio et iter reficiunt animum, Sen. Tranq. 17, 8: assidua equi post cibum, Suet. Calig. 3.—Also in act. sense, a carrying or bearing: sarcinae, Aug. Civ. Dei, 22, 8, 11.