sigmoid flexure

2 definitions found

sigmoid flexure - Collaborative International Dictionary of English v.0.48 :

  Sigmoid \Sig"moid\, Sigmoidal \Sig*moid"al\, a. [Gr. ???; ???
     sigma + e'i^dos form, likeness: cf. F. sigmo["i]de.]
     Curved in two directions, like the letter S, or the Greek
     [sigmat].
     [1913 Webster]
  
     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.
        [1913 Webster]

sigmoid flexure - WordNet (r) 2.1 (2005) :

  sigmoid flexure
      n 1: the s-shaped curve between the descending colon and the
           rectum [syn: sigmoid colon, sigmoid flexure]