English Explanatory Dictionary

sigma

English dictionary entry

Meanings

noun
  1. The eighteenth letter of the Classical and Modern Greek alphabets (Σ, σ), the twentieth letter of Old and Ancient.
  2. The symbol Σ, used to indicate summation of a set or series.
  3. The symbol σ, used to indicate one standard deviation from the mean, particularly in a normal distribution.
  4. A sigma male (a self-reliant and assertive male).
adj
  1. Possessing characteristics of a sigma male.
name
  1. A municipality of Capiz, Philippines.

Pronunciation

/ˈsɪɡmə/ En-us-sigma.ogg LL-Q1860 (eng)-Flame, not lame-Sigma.wav

Word forms

sigma sigmas sigmata more sigma most sigma

Etymology

From Ancient Greek σῖγμα (sîgma), probably from the root σῑγ- (sīg-) as seen in σίζω (sízō, “to hiss”) + -μα (-ma, nominal suffix).

Derived words

delta-sigma converter final sigma lunate sigma sigma additivity sigma-algebra sigma bond sigma darner sigma-delta converter sigmalike sigma male sigmate sigmatic sigmatism sigmavirus sigmoid Six Sigma the sigma within one sigma
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