τετράπορος
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 with four passages or openings, ἁψῖδες AP9. 696. II coming four ways, ἄνεμοι ib.656.
German (Pape)
[Seite 1099] mit vier Gängen, Löchern, ὰψῖδες, Byz. anath. 3 (IX, 696).