sigma
adjEtymology From Ancient Greek σῖγμα (sîgma), probably from the root σῑγ- (sīg-) as seen in σίζω (sízō, “to hiss”) + -μα (-ma, nominal suffix).
1
Internet Possessing characteristics of a sigma male.
sigma
noun/ˈsɪɡmə/
Etymology From Ancient Greek σῖγμα (sîgma), probably from the root σῑγ- (sīg-) as seen in σίζω (sízō, “to hiss”) + -μα (-ma, nominal suffix).
1
The eighteenth letter of the Classical and Modern Greek alphabets (Σ, σ), the twentieth letter of Old and Ancient.
- Their names, which are expressive of some bodily or mental excellence, all end with the same letter---the letter which is called San by the Dorians, and Sigma by the Ionians."Herodotus: On The Customs of the Persians", I.139
2
Mathematics, Sciences The symbol Σ, used to indicate summation of a set or series.
3
Mathematics, Sciences, Statistics The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.
- 2011, Paul Rincon, (bbc.co.uk) LHC: Higgs boson 'may have been glimpsed' None of the spikes seen by the experiments is at much more than the "two sigma" level of certainty. A level of "five sigma" is required to claim a discovery, meaning there is less than a one in a million chance the data spike is down to a statistical fluke.
4
Internet A sigma male (a self-reliant and assertive male).
- Derived terms
- delta-sigma converter, final sigma, lunate sigma, sigma additivity, sigma-algebra, sigma bond, sigma darner, sigma-delta converter, sigmalike, sigma male, sigmate, sigmatic, sigmatism, sigmavirus, sigmoid, Six Sigma, the sigma, within one sigma