χειράς
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)
άδος, ἡ, (χείρ)
A chap, crack, prop. in the hands, but also in the feet, χειράδες χειρῶν, ποδῶν, chapped hands or feet, D.L.1.81; also χιράς Suid., Eust.194.40. II heap of stones, etc., Hsch.
