SIGMA

sigma

(noun) the 18th letter of the Greek alphabet

Source: WordNet® 3.1

Etymology

Noun

sigma (plural sigmas or sigmata)

The eighteenth letter of the Classical and Modern Greek alphabets, the twentieth letter of Old and Ancient.

• "Herodotus: On The Customs of the Persians", I.139

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.

(mathematics) The symbol Σ, used to indicate summation of a set or series.

(statistics) The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.

Anagrams

• Magis., agism, migas

Source: Wiktionary

Sig"ma, n.; pl. Sigmas. Etym: [L., from Gr.

Definition: The Greek letter S, or s). It originally had the form of the English C.

Source: Webster’s Unabridged Dictionary 1913 Edition

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