ζῴαρχος
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 commander of one elephant, Ascl.Tact.9.1, Ael.Tact. 23.1.
Greek (Liddell-Scott)
ζῴαρχος: -ον, ὁ ὁδηγῶν ἐλέφαντα, ἐπὶ τοῦ ὁδηγοῦ, Αἰλ. Τακτ. 23. 1.