Sigmoid

Sigmoid , adjective

[Greek {not transcribed}; {not transcribed} sigma + e'i^dos form, likeness: compare French sigmoide.]

Curved in two directions, like the letter S, or the Greek s.

Collocations (2)

Sigmoid flexure (Anatomy) , the last curve of the colon before it terminates in the rectum.

Sigmoid valves (Anatomy) , See Semilunar valves, under Semilunar.

Also: Sigmoidal