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sigmoid

[sig-moid] /ˈsɪg mɔɪd/
adjective
1.
shaped like the letter C.
2.
shaped like the letter S.
3.
of, pertaining to, or situated near the sigmoid flexure of the large intestine.
Also, sigmoidal.
Origin
1660-1670
1660-70; < Greek sigmoeidḗs shaped like a sigma. See sigma, -oid
Related forms
sigmoidally, adverb
postsigmoid, adjective
postsigmoidal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for sigmoidal

sigmoid

/ˈsɪɡmɔɪd/
adjective
1.
shaped like the letter S
2.
of or relating to the sigmoid colon of the large intestine
noun
3.
Word Origin
C17: from Greek sigmoeidēs sigma-shaped
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for sigmoidal

sigmoid

adj.

"shaped like a C" (1660s) or "shaped like an S" (1786), from sigma (q.v.) + -oid. Especially of the flexure of the colon (1891).

Online Etymology Dictionary, © 2010 Douglas Harper
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sigmoidal in Medicine

sigmoid sig·moid (sĭg'moid') or sig·moi·dal (sĭg-moid'l)
adj.

  1. Having the shape of the letter S.

  2. Of or relating to the sigmoid flexure of the colon.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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