Prozymites
From BiblePortal Wikipedia
Prozymites [1]
(from Greek Πρό , Jonr, Ζύμη , Lecaven, i.e. Jor Leavened Bread ) is a term applied reproachfully by the Western Church to the adherents of the Greek Church because they contended for the use of leavened, or common, bread in the Eucharist. The Latin Church were Azymites (q.v.). (See Also Eucharist)
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