ἀγέχορος
From LSJ
εἰργάζοντο λογάδην φέροντες λίθους καὶ ξυνετίθεσαν ὡς ἕκαστόν τι ξυμβαίνοι → they went to work bringing the stones as they picked them out and put them together as each one happened to fit
German (Pape)
[Seite 13] ὁ, Chorführer, Ar. Lys. 1281.
Greek (Liddell-Scott)
ἀγέχορος: ὁ ἄγων τὸν χορόν, ἐπὶ δὲ δίδυμον ἀγέχορον ἰήιον εὔφρον’.., Ἀριστοφ. Λυσ. 1281.