was wotd|2007|May|19
English
Etymology
From AGr. polytonic|�ιγμοειδή� (sigmoeid�s) < polytonic|�ίγμα or polytonic|��γμα (sigma) "sigma" + polytonic|εἶδο� (eidos) "form, likeness". Compare with French sigmoïde.

Pronunciation
IPA|/�sɪg.m�ɪd/
audio|en-us-sigmoid.ogg|Audio (US)

Adjective
Image:S-shape.PNG|right|thumb|Crude rendering of variations on the sigmoid shape
en-adj|-

1. geometry Curved in two directions, like the letter "S", or the Greek � (sigma).
2. context|geometry|archaic semi-circular|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
sigmoidoscope

Noun
en-noun

1. math A function having a graph whose shape is sigmoid. See w:Sigmoid|Wikipedia, Mathworld.

Category:Shapes

vi:sigmoid
zh:sigmoid

• 2007-05-25 16:29 - Connel MacKenzieBot - Robot: Automated text replacement (-==English== +{{was wotd|2007|May|19}}\n==English==)

Full Revision History