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sigmoidal |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Sigmoid \Sig"moid\, Sigmoidal \Sig*moid"al\, a. [Gr. ???; ??? sigma + ??? form likeness: cf F. sigmo["i]de.] Curved in two directions, like the letter S, or the Greek [sigmat]. {Sigmoid flexure} (Anat.), the last curve of the colon before it terminates in the rectum. See Illust. under {Digestive}. {Sigmoid valves}. (Anat.) See {Semilunar valves}, under {Semilunar}. From WordNet r 1.6 [wn]: sigmoidal adj : of or relating to the sigmoid flexure in the large intestine [syn: {sigmoid}]
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