Origin of exclusion
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the act or an instance of excluding or the state of being excluded
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
c.1400, from Latin exclusionem (nominative exclusio), noun of action from past participle stem of excludere (see exclude).
Online Etymology Dictionary, © 2010 Douglas Harper
Surgical isolation of a part or segment without removal from the body.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.