noun Medicine/Medical.
visual inspection of the interior of the colon with a flexible, lighted tube inserted through the rectum.
Also called coloscopy.

colonoscopic [kuh-lon-uh-skop-ik] , adjective
colonoscopically, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
colonoscope (kəˈlɒnəˌskəʊp)
an instrument for examining the colon, consisting of a flexible lighted tube that is inserted in the colon to look for abnormalities and to remove them or take tissue samples
[C20: from colon² + -o- + -scope]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

from colon (2) + -oscopy.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

colonoscopy co·lon·os·co·py (kō'lə-nŏs'kə-pē)
Examination of the inner surface of the colon by means of a colonoscope. Also called coloscopy.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
colonoscopy   (kō'lə-nŏs'kə-pē)  Pronunciation Key 
Inspection of the interior surface of the colon with a flexible endoscope that is equipped to obtain tissue samples and inserted through the rectum.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Let's be honest: nobody really wants to get a colonoscopy, even if the
  procedure is crucial in finding nascent tumors.
The two met and decided to do yet another colonoscopy.
Now my doctor says he is unable to repeat a colonoscopy.
Not everyone has the guts to write an ode to colonoscopy.
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