Definition of Sigmoid

1. Adjective. Curved in two directions (like the letter S).

Partainyms: Curve

2. Adjective. Of or relating to the sigmoid flexure in the large intestine.
Exact synonyms: Sigmoidal
Partainyms: Sigmoid Flexure, Sigmoid Flexure

Definition of Sigmoid

1. a. Curved in two directions, like the letter S, or the Greek &sigmat;.

Definition of Sigmoid

1. Adjective. (geometry) Curved in two directions, like the letter "S", or the Greek ? (sigma). ¹

2. Adjective. (context: geometry archaic) Semi-circular, like the lunar sigma (similar to English C). ¹

3. Adjective. (anatomy) Relating to the sigmoid flexure of the large intestine. ¹

4. Noun. (mathematics) A function having a graph whose shape is sigmoid. See Wikipedia, [ Mathworld]. ¹

¹ Source:

Definition of Sigmoid

1. an S-shaped curve in a bodily part [n -S]

Medical Definition of Sigmoid

1. 1. Shaped like the letter S or the letter C. 2. The sigmoid colon. Origin: Gr. Sigmoeid, from the letter sigma, eidos = form This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Sigmoid Pictures

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Lexicographical Neighbors of Sigmoid

sigma additivity
sigma bond
sigma effect
sigma factor
sigma peptide
sigmoid (current term)
sigmoid arteries
sigmoid colon
sigmoid colons
sigmoid flexure
sigmoid fossa
sigmoid groove
sigmoid kidney
sigmoid lymph nodes
sigmoid notch
sigmoid sinus
sigmoid sulcus
sigmoid vein
sigmoid veins
sigmoid volvulus

Literary usage of Sigmoid

Below you will find example usage of this term as found in modern and/or classical literature:

1. The Surgical Clinics of North America by Stanley P. L. Leong (1922)
"THE sigmoid ADHESION AGAIN I bring to your attention a case illustrating the significance of adhesion and kinking of the sigmoid flexure. ..."

2. Surgery, Gynecology & Obstetrics by The American College of Surgeons, Franklin H. Martin Memorial Foundation (1913)
"The sigmoid adhesion as typically seen involving the Fallopian tube. from ... There is a clear-cut symptomatology associated with adhesion of the sigmoid. ..."

3. The Medical and Surgical Reporter (1896)
"THE IMPORTANCE OF MAKING EXAMINATIONS OF THE sigmoid FLEXURE OF THE COLON.* The sigmoid flexure, as you know, is the double curve the descending colon takes ..."

4. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1908)
"Carcinoma of the Ovary Involving the sigmoid Flexure.—BOWERMAN JESSETT (Bnt. Gyn ... It proved to be ovarian, and resection of the sigmoid proved essential. ..."

5. The Anatomy and Physiology of the Human Body by John Bell, Charles Bell (1829)
"... so the joint consists of the olecranon and the coronoid process as the two guards, and of the sigmoid cavity or hollow of articulation betwixt them. ..."

6. The Medical Clinics of North America by Richard J. Havel, K. Patrick Ober (1919)
"Dunn, AD: Diverticulitis of the sigmoid, Proctologist, vol. 7, pp. 66-72. Dunn and Wooley: Acquired Diverticulitis of the sigmoid, with a Report of 6 Cases, ..."

7. Transactions of the American Association of Obstetricians and Gynecologists by American Association of Obstetricians and Gynecologists (1916)
"As the main channel of the bowel was thought to be still uncovered, this diverticulum was ligated at the sigmoid and rectal attachments and removed. ..."

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