sigmoid colon


Definition of sigmoid colon

: the contracted and crooked part of the colon immediately above the rectum

called also sigmoid flexure

Examples of sigmoid colon in a Sentence

Recent Examples on the Web Proctosigmoiditis: This is inflammation that affects both the rectum and the sigmoid colon, which is the lower end of the colon. Kathryn Watson, SELF, 24 Mar. 2022 Sometimes, tiny pouches can form in your gastrointestinal tract—usually in the lower part of the colon called the sigmoid colon, according to the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Karen Pallarito,, 4 Nov. 2021 Normally, that stool will be evacuated, but when you get constipated, that stool builds up in your colon—often the sigmoid colon, which is at the very end of your digestive system right before your rectum—and blocks the flow. Colleen Stinchcombe,, 8 Oct. 2021 Born in South Carolina and raised in California, DeBord spent her 20s and early 30s as a probation officer, Hollywood location scout and stay-at-home mom, unaware of the cancer in her sigmoid colon. Joe Carlson, Star Tribune, 24 Aug. 2020 Proctosigmoiditis: With this type, inflammation involves the rectum and extends to the sigmoid colon, the lower end of the colon. Korin Miller, SELF, 19 Aug. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sigmoid colon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of sigmoid colon

1896, in the meaning defined above

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The first known use of sigmoid colon was in 1896

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Dictionary Entries Near sigmoid colon

sigmoid cavity

sigmoid colon


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Cite this Entry

“Sigmoid colon.” Dictionary, Merriam-Webster, Accessed 27 Jun. 2022.

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More Definitions for sigmoid colon

sigmoid colon


Medical Definition of sigmoid colon

: the contracted and crooked part of the colon immediately above the rectum

called also pelvic colon, sigmoid flexure

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