From the Greek word meaning a split or division. In the NT (1 Cor. 12: 25) Paul uses the word when he deplores factions in the Church. From the 2nd cent. (Irenaeus) it is used of a formal separation from the Great Church.
Citation for schism
Citation styles are based on the Chicago Manual of Style, 15th Ed., and the MLA Style Manual, 2nd Ed..
MLA
"schism." In A Dictionary of the Bible. Ed. W. R. F. Browning. Oxford Biblical Studies Online. May 21, 2013. <http://www.oxfordbiblicalcstudies.com/article/opr/t94/e1694>.
Chicago
"schism." In A Dictionary of the Bible. , edited by W. R. F. Browning. Oxford Biblical Studies Online, http://www.oxfordbiblicalcstudies.com/article/opr/t94/e1694 (accessed May 21, 2013).