sigma

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sig·ma

 (sĭg′mə)
n.
1. The 18th letter of the Greek alphabet. See Table at alphabet.
2. A sigma factor.
3. Statistics The standard deviation of a given probability distribution or a given set of data.

[Greek sīgma, of Phoenician origin; see smk in Semitic roots.]

sig′mate′ (-māt′) adj.

sigma

(ˈsɪɡmə)
n
1. (Letters of the Alphabet (Foreign)) the 18th letter in the Greek alphabet (Σ, σ, or, when final, ς), a consonant, transliterated as S
2. (Mathematics) maths the symbol Σ, indicating summation of the numbers or quantities indicated
[Greek, of Semitic origin; related to Hebrew samekh]

sig•ma

(ˈsɪg mə)

n., pl. -mas.
the 18th letter of the Greek alphabet: Σ, σ, ς.
[1600–10; < Latin < Greek sígma]
sig•mate (ˈsɪg mɪt, -meɪt) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sigma - the 18th letter of the Greek alphabetsigma - the 18th letter of the Greek alphabet
Greek alphabet - the alphabet used by ancient Greeks
alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"
Translations
sigma
sigma
sigma

sigma

[ˈsɪgmə] nsigma m or f inv