Hypertext Webster Gateway: "sigmoidal"
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) 1.7 (wn)
sigmoidal
adj : of or relating to the sigmoid flexure in the large intestine
[syn: {sigmoid}]
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