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sigma

[sig-muh] /ˈsɪg mə/
noun
1.
the 18th letter of the Greek alphabet: Σ, σ, ς.
2.
the consonant sound represented by this letter.
Origin
1600-1610
1600-10; < Latin < Greek sígma
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for sigma
  • By definition, three sigma events are not supposed to come in battalions.
  • If we're on the topic of alternatives how about some form of six-sigma normalization of the prices of goods and wages.
  • sigma receptors are effected by cocaine, as cocaine functions as a sigma ligand agonist.
British Dictionary definitions for sigma

sigma

/ˈsɪɡmə/
noun
1.
the 18th letter in the Greek alphabet (Σ, σ, or, when final, ς), a consonant, transliterated as S
2.
(maths) the symbol Σ, indicating summation of the numbers or quantities indicated
Word Origin
Greek, of Semitic origin; related to Hebrew samekh
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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sigma in Medicine

sigma sig·ma (sĭg'mə)
n.

Symbol ς The 18th letter of the Greek alphabet.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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sigma in Science
sigma
  (sĭg'mə)   
A sigma baryon.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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sigma in Technology

A scientific visual programming environment from NASA.
(http://fi-www.arc.nasa.gov/fia/projects/sigma/).
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Word Value for sigma

8
10
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