Sigma

English

Greek Alphabet

← rho	33px30px23px	→ tau
Σ σ Greek: σίγμα
Wikipedia article on Sigma

Noun

Sigma (plural Sigmas)

1. The name for the eighteenth letter of the Classical and Modern Greek, the nineteenth letter of Old and Ancient.
2. (mathematics) The symbol Σ, used to indicate summation of a set or series.
3. (statistics) The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.

Derived terms

• sigmalike
• within one sigma: the range from the mean, plus or minus one standard deviation, usually covering 68% of the data points in a normal distribution

Translations

letter of the Greek alphabet

Catalan: sigma (ca) f. Czech: sigma (cs) n. Dutch: sigma (nl) m. Greek: σίγμα (el) n. Interlingua: sigma (ia)

Japanese: シグマ (ja) (shiguma) Portuguese: sigma (pt) m. Russian: сигма (ru) (sígma) f. Slovak: sigma (sk) n. Spanish: sigma (es) f.

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Catalan

Noun

Sigma f. (plural sigmes)

1. Sigma; the Greek letter Σ (lowercase σ or ς).

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Czech

Noun

Sigma n.

1. sigma

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French

Noun

Sigma m. inv.

1. sigma (Greek letter)

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Italian

Noun

Sigma m. and f. inv.

1. sigma (Greek letter)

Sigma m. inv.

1. sigmoid colon

Anagrams

• sgami

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Spanish

Noun

Sigma

1. sigma; the Greek letter Σ, σes:sigma