When members of a church congregation disagree and divide into two separate churches based on their different beliefs, this is an example of a schism.
The schism between Sunnis and Shias happened quite early in Islamic history.
Origin of schism
- Middle English scisme from Old French from Latin schisma schismat- from Greek skhisma from skhizein to split skei- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Old French cisme or scisme, from Ancient Greek ÏƒÏ‡Î¯ÏƒÎ¼Î± (skhisma, “division"), from ÏƒÏ‡Î¯Î¶Ï‰ (skhizÅ, “I split").