sigma
(noun) the 18th letter of the Greek alphabet
Source: WordNet® 3.1
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.
• 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
24 June 2025
(noun) very small (to 3 inches) flattened marine fish with a sucking disc on the abdomen for clinging to rocks etc.
Contrary to popular belief, coffee beans are not technically beans. They are referred to as such because of their resemblance to legumes. A coffee bean is a seed of the Coffea plant and the source for coffee. It is the pit inside the red or purple fruit, often referred to as a cherry. Just like ordinary cherries, the coffee fruit is also a so-called stone fruit.
