sigmoid
Americanadjective
-
shaped like the letter C.
-
shaped like the letter S.
-
of, relating to, or situated near the sigmoid flexure of the large intestine.
adjective
-
shaped like the letter S
-
of or relating to the sigmoid colon of the large intestine
noun
Other Word Forms
- postsigmoid adjective
- postsigmoidal adjective
- sigmoidally adverb
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 2021, surgeons removed half of his colon due to a narrowing of the sigmoid portion of his large intestine.
From Washington Times • Dec. 18, 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 inferior mesenteric artery gives off a left colic branch to the descending colon, a sigmoid branch to the iliac and pelvic colon, and ends in the superior haemorrhoidal artery, which supplies the rectum.
From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" by Various
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.
