sigmoido-, sigmo- +

(Greek: sigmoeides, shaped like the letter sigma; pertaining to the sigmoid flexure, the S-shaped bend in the colon; a combining form that usually denotes the sigmoid colon)

anosigmoidoscopy
The endoscopic examination of the anus, rectum, and sigmoid colon.
dolichosigmoid
Having an abnormally long sigmoid flexure (S-shaped curve) of the large intestine between the descending colon and the rectum.
proctosigmoidectomy
Surgical excision of the anus, rectum, and sigmoid flexure.
proctosigmoiditis
Inflammation of the rectum and sigmoid colon.
proctosigmoidoscope
An instrument for illuminating and viewing the rectum and sigmoid colon.
proctosigmoidoscopy
The examination of the rectum and sigmoid with the sigmoidoscope.
rectosigmoidectomy
The surgical excision of the rectum and sigmoid.
sigmoid
1. Shaped like the Greek capital letter sigma (Σ), or like the letter "S".
2. A reference to the sigmoid flexure.
sigmoid colon, clon sigmoideum
1. The S-shaped part of the colon which lies in the pelvis, extending from the pelvic brim to the third segment of the sacrum, and is continuous above with the descending (or iliac) colon and below with the rectum.
2. The part of the colon that turns medially at the left iliac crest, between the descending colon and the rectum; shaped like the letter "S".
sigmoidectomy
Excision of the sigmoid colon (the portion of the colon that connects to the descending colon above and the rectum below).
sigmoidectomy, colectomy
The surgical excision of the sigmoid colon.
sigmoiditis
Inflammation of the sigmoid colon.
sigmoidopexy
Operative attachment of the sigmoid colon to a firm structure to correct rectal prolapse (protrusion of the rectal mucous membrane through the anus).

The sigmoid colon is that portion of the colon that connects to the descending colon above and the rectum below.

sigmoidoscope
A fiber-optic tubular instrument inserted through the anus for examining the interior of the rectum and sigmoid (lower) colon.
sigmoidoscopy
Inspection of the sigmoid colon through a sigmoidoscope.