σ

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See also: ς, Σ, σ., σ', and ƍ

σ U+03C3, σ
GREEK SMALL LETTER SIGMA
ς
[U+03C2]
Greek and Coptic τ
[U+03C4]

Translingual

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Symbol

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σ

  1. (mathematics, statistics) Standard deviation.
  2. (mathematics) Sum of divisors.
  3. (mathematics) Braid group algebra.
  4. (physics, scattering) Cross section.
  5. (linguistics, phonology) Syllable.
  6. (IPA, obsolete) a labialized alveolar fricative: identified as IPA [θʷ] or [sᶲ], equivalent to Shona ȿ.
    See also: ƍ
  7. (spatial databases) The select operation.
  8. (physics) The Stefan-Boltzmann constant.
  9. (chemistry) A shielding constant.

Ancient Greek

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Alternative forms

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  • ϲ (s)lunate sigma
  • ς (s)word-final position

Etymology

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Derived from its majuscule counterpart Σ.

Letter

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σ (s) (lowercase, uppercase Σ)

  1. Lower-case sigma (σίγμα), the 18th letter of the ancient Greek alphabet. It represented the voiceless alveolar fricative /s/. It is preceded by ρ and followed by τ.

Derived terms

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See also sigma

See also

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Greek

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Alternative forms

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  • ς (s) (only at the end of a word)

Letter

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σ (s) (lowercase, uppercase Σ)

  1. The lower case letter sigma (σίγμα), the 18th letter of the modern Greek alphabet.

See also

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