schism : Idioms & Phrases
great schism
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noun the period from 1378 to 1417 during which there were two papacies in the Roman Catholic Church, one in Rome and one in Avignon
WordNet
Great schism , ∨ Western schism
(Eccl.) a schism in the church in the latter part of the 14th century, on account of rival claimants to the papal throne.
Webster 1913
Greek schism
(Eccl.) , the separation of the Greek and Roman churches.
Webster 1913
Schism act
(Law) , an act of the English Parliament requiring all teachers to conform to the Established Church, passed in 1714, repealed in 1719.