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sigmoid

[sig-moid] /ˈsɪg mɔɪd/
adjective
1.
shaped like the letter C.
2.
shaped like the letter S.
3.
of, relating 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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Examples from the web for sigmoid
  • In other words, a sigmoid can indeed be used as a reliable indicator of the likelihood that a particular region will erupt.
  • The colon consists of the ascending, transverse, descending and sigmoid sections.
  • On it rest some coils of small intestine, and occasionally the distended sigmoid colon.
  • They are chiefly appended to the transverse and sigmoid parts of the colon.
  • The river flows in long sigmoid curves through an alluvial valley of no great width.
  • They are only helpful for milder ulcerative colitis involving the rectum and sigmoid colon.
British Dictionary definitions for sigmoid

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 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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sigmoid 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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