sigmoid

  1. Adjective.  (geometry) Curved in two directions, like the letter "S", or the Greek ς (sigma).
  2. Adjective.  (context, geometry) Semi-circular, like the lunar sigma (similar to English C).
  3. Adjective.  (anatomy) Relating to the sigmoid flexure of the large intestine.
  4. Noun.  (mathematics) A function having a graph whose shape is sigmoid. See Wikipedia, [http://mathworld.wolfram.com/SigmoidFunction.html Mathworld].

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This entry was last updated on RefTopia from its source on 3/20/2012.