Sigma etymology

English

English word sigma comes from Ancient Greek σίγμα

Etymology of sigma

Detailed word origin of sigma

Dictionary entry Language Definition
σίγμα Ancient Greek (grc)
sigma English (en) (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.. The eighteenth letter of the Classical and Modern Greek, the twentieth letter of Old and Ancient.