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sigma: Meaning and Definition of

sig•ma

Pronunciation: (sig'mu), [key]
— n.
  1. the 18th letter of the Greek alphabet: &Sgr;, &sgr;, &sfgr;.
  2. the consonant sound represented by this letter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
siglos sigma particle
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