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