Sigmoidal

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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]

From WordNet (r) 2.0 [wn]:

  sigmoidal
       adj : of or relating to the sigmoid flexure in the large intestine
             [syn: {sigmoid}]