Definition of "sigmoidoscope" []

• A tubular instrument for visual examination of the sigmoid colon. (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.

• "The doctor inserts a long, flexible, lighted tube called a sigmoidoscope, or scope, into the anus and slowly guides it through the rectum and into the sigmoid colon."
• "A sigmoidoscope is a slender, lighted tube about the thickness of a finger."
• "At the Stanford University School of Medicine (a place, as it happens, where I once underwent an absolutely hilarious procedure with a sigmoidoscope), the grim-faced researchers showed 10 men and 10 women a sample of 70 black-and-white cartoons and got them to rate the gags on a "funniness scale.""