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
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
Francis had developed a diverticular stenosis, or narrowing, of the sigmoid portion of the large intestine.
From Seattle Times ● Jul. 5, 2021
One of them may occupy the cecum, another the transverse colon, and possibly a third the sigmoid flexure.
From Intestinal Ills Chronic Constipation, Indigestion, Autogenetic Poisons, Diarrhea, Piles, Etc. Also Auto-Infection, Auto-Intoxication, Anemia, Emaciation, Etc. Due to Proctitis and Colitis by Jamison, Alcinous B. (Alcinous Burton)
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.
