ἀντίφωνος
ἀντίφων-ος, ον,(φωνή)
A). sounding in answer, concordant, as in the octave, ὀξύτητα βαρύτητι σύμφωνον καὶ ἀ. Lg. 812d : abs., ἁρμονίαι . 2.485
II). discordant, contradictory, , 2.361a Corp.Herm. 16.1 : c. gen., τῶν γενησομένων . 2.412b
III). as Subst., ἀντίφωνον, concord in the octave, τὸ ἀ. σύμφωνόν ἐστι διὰ πασῶν Pr. 918b30 , 921a8 .