noun, plural colectomies. Surgery.
the removal of all or part of the colon or large intestine.

col-2 + -ectomy Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
colectomy (kəˈlɛktəmɪ)
n , pl -mies
surgical removal of part or all of the colon

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1882, from colon + -ectomy.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

colectomy co·lec·to·my (kə-lěk'tə-mē)
Surgical removal of part or all of the colon.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
It is not so uncommon to see acutely ill patients with life-threatening sepsis from colitis and need for urgent colectomy.
The standard technique for a colectomy is open, invasive surgery.
Unlike colectomy, these procedures do not involve cutting through the abdominal wall.
When only part of the colon is removed, it is called a partial colectomy.
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