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(), Sigmoid"al ()} a.[Gr. ; sigma + form, likeness: cf. F. sigmode.] Curved in two directions, like the letter S, or the Greek . 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. スポンサード リンク
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