Etymology
From French antiphone or Medieval Latin antiphōna, from Ancient Greek ἀντίφωνα (antíphōna, “responses, musical accords”), neuter plural substantive of ἀντίφωνος (antíphōnos, “concordant”) from ἀντί (antí, “in return”) + φωνή (phōnḗ, “sound”). Doublet of anthem.