πεντάχορδος
From LSJ
εἰς τὴν ἀγορὰν χειροτονεῖτε τοὺς ταξιάρχους καὶ τοὺς φυλάρχους, οὐκ ἐπὶ τὸν πόλεμον → you elect taxiarchs and phylarchs for the marketplace not for war
English (LSJ)
ον,
A five-stringed, [μάγαδις] Ath.14.637a : -χορδον, τό, a five-stringed instrument, Poll.4.60 ; π. συστήματα scales of five notes, Theo Sm.p.49 H.