μετάχρονος
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)
ον,
A out of date, anachronistic, πράγματα μ. [ὀρχεῖσθαι] Luc.Salt.80.
German (Pape)
[Seite 157] nach der Zeit, später geschehen, Luc. salt. 80.