sigmoid
Americanadjective
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shaped like the letter C.
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shaped like the letter S.
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of, relating to, or situated near the sigmoid flexure of the large intestine.
adjective
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shaped like the letter S
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of or relating to the sigmoid colon of the large intestine
noun
Other Word Forms
Etymology
Origin of sigmoid
First recorded in 1660–70, sigmoid is from the Greek word sigmoeidḗs shaped like a sigma. See sigma, -oid
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Ozaki died "due to stage 4 sigmoid colon cancer" on Tuesday, his son, Tomoharu, said Wednesday in a statement obtained by AFP.
From Barron's ● Dec. 24, 2025
In July of 2021, Francis had half of his colon removed after a narrowing of the sigmoid portion of the large intestine, the Associated Press reported at the time.
From Washington Times ● Jun. 12, 2022
The colon can be divided into four regions, the ascending colon, the transverse colon, the descending colon and the sigmoid colon.
From Textbooks ● Jun. 9, 2022
In surgeries like the one Francis most likely underwent, doctors excise a part of the colon called the sigmoid colon where diverticulitis is most common.
From New York Times ● Jul. 5, 2021
The sigmoid flexure was adherent to the abdominal wall opposite the wound of exit, and a dark ecchymosed patch was found, but no perforation could be detected.
From Surgical Experiences in South Africa, 1899-1900 Being Mainly a Clinical Study of the Nature and Effects of Injuries Produced by Bullets of Small Calibre by Makins, George Henry
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
