AskDefine | Define sigmoid

Dictionary Definition

sigmoid adj
1 curved in two directions (like the letter S)
2 of or relating to the sigmoid flexure in the large intestine [syn: sigmoidal]

User Contributed Dictionary



From (sigmoeidēs) < or (sigma) "sigma" + (eidos) "form, likeness". Compare with French sigmoïde.


  • /ˈsɪg.mɔɪd/


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



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

Extensive Definition

Sigmoid means resembling the lower-case Greek letter sigma (ς). Specific uses include:
sigmoid in German: Sigmoid
sigmoid in Turkish: Sigmoid
sigmoid in French: Sigmoïde

Synonyms, Antonyms and Related Words

Privacy Policy, About Us, Terms and Conditions, Contact Us
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2
Material from Wikipedia, Wiktionary, Dict
Valid HTML 4.01 Strict, Valid CSS Level 2.1