sigmoid

WOTD - 19 May 2007    

English

Wikipedia

Etymology

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

Pronunciation

• IPA: /ˈsɪɡ.mɔɪd/

• Audio (US)

  (file)

Adjective

Crude rendering of variations on the sigmoid shape

sigmoid (not comparable)

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.

Synonyms

• sigmoidal

Derived terms

• sigmoid artery
• sigmoid colon
• sigmoid flexure
• sigmoid fossa
• sigmoid groove
• sigmoid sinus
• sigmoid valve
• sigmoid function
• sigmoidoscope

Translations

• French: sigmoïde (fr)

Noun

sigmoid (plural sigmoids)

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