σορός
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)
ἡ,
A vessel for holding human remains, cinerary urn, ὣς δὲ καὶ ὀστέα νῶϊν ὁμὴ σ. ἀμφικαλύπτοι Il.23.91; coffin, Hdt.1.68, 2.78, Ar.Ach.691, Lys.600, etc.; of stone, Thphr.Ign.46, Dsc.5.124: prov., τὸν ἕτερον πόδα ἐν τῇ σ. ἔχειν Luc.Herm.78; bier, Ev.Luc.7.14, PLond.1.121.236 (iii A.D.). II as nickname of an old man or woman, Ar.V.1365, Macho ap.Ath.13.580c. III αἱ δημόσιαι σ. dub. sens. in PLips.86.11 (iv A.D.).