Azyma

   The Greek term for unleavened bread used in the Eucharist (q.v.) by the Armenian church, and later by the Latin church. The Byzantine church used leavened bread (enzyma). An issue in the church schism of 1054 (q.v.), it was a further bone of contention at the Council of Lyons (q.v.) in 1274, and later in 1438-1439 at the Council of Ferrara-Florence (q.v.). To average Byzantines it came to symbolize just how irreconcilable were their differences with the West.