sigmoid

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WOTD - 19 May 2007    

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[edit] English

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Wikipedia

[edit] Etymology

From Ancient Greek σιγμοειδής (sigmoeidēs) < σίγμα or σῖγμα (sigma) "sigma" + εἶδος (eidos) "form, likeness". Compare with French sigmoïde.

[edit] Pronunciation

[edit] Adjective

Crude rendering of variations on the sigmoid shape
Crude rendering of variations on the sigmoid shape

sigmoid (not comparable)

Positive
sigmoid

Comparative
not comparable

Superlative
none (absolute)

  1. (geometry) Curved in two directions, like the letter "S", or the Greek ς (sigma).
  2. (geometry, archaic) Semi-circular, like the lunar sigma (similar to English C).
  3. (anatomy) Relating to the sigmoid flexure of the large intestine.

[edit] Synonyms

[edit] Derived terms

[edit] Noun

Singular
sigmoid

Plural
sigmoids

sigmoid (plural sigmoids)

  1. (mathematics) A function having a graph whose shape is sigmoid. See Wikipedia, Mathworld.
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