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



RESET




Word of the Day

20 April 2025

SALAD

(noun) food mixtures either arranged on a plate or tossed and served with a moist dressing; usually consisting of or including greens


coffee icon

Coffee Trivia

An article published in Harvard Men’s Health Watch in 2012 shows heavy coffee drinkers live longer. The researchers examined data from 400,000 people and found out that men who drank six or more coffee cups per day had a 10% lower death rate.

coffee icon