Definition of "endoscope" [en•do•scope]

• An instrument for examining visually the interior of a bodily canal or a hollow organ such as the colon, bladder, or stomach. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "An endoscope is a probe with a tiny camera and bright light that is inserted into natural body openings such as the anus, urethra or vagina."
• "A procedure involving the passage of a thin endoscope through the mother's abdomen and into the uterus to directly observe the fetus and placenta."
• "Sinus surgery used to be done by cutting through the face, but today it is mostly done by sticking a thin flexible tube called an endoscope up the nostrils."