sigmoid-

sigmoido-

, sigmoid-
Sigmoid, usually the sigmoid colon.
[G. sigma, the letter σ, + eidos, resemblance]

sigmoid-

prefix meaning "sigmoid colon"; the section of the colon shaped like the Greek letter sigma: sigmoidoscope, sigmoidectomy.

sigmoido-

, sigmoid-
Combining forms denoting sigmoid, usually the sigmoid colon.
[G. sigma, the letter σ, + eidos, resemblance]