colonoscopy

Definition / meaning of colonoscopy

Examination of the inside of the colon using a colonoscope, inserted into the rectum. A colonoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a tool to remove tissue to be checked under a microscope for signs of disease.

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Find More About 'colonoscopy'

Source(s):

The Web site of the National Cancer Institute (http://www.cancer.gov/)

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