σ

See also: ς, Σ, σ., and σ'

Translingual

Symbol

σ

1. (mathematics, statistics) Standard deviation.
2. (mathematics) Sum of divisors.
3. (mathematics) Braid group algebra.
4. (Physics, scattering) Cross_section_(physics).
5. (linguistics, phonology) Syllable.
6. (spatial databases) The select operation.
7. (physics) The Stefan–Boltzmann constant.
8. (chemistry) A shielding constant.

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Greek

Letter

σ, ς (Σ uppercase)

1. The lower case letter sigma (σίγμα), the 18th letter of the modern Greek alphabet. When the final letter in a word of lower case letters is sigma the alternative (ς) form must be used; it may be used only in this final position.

Numeral

σ'

1. The number 200 in Greek numerals.

,σ

1. The number 200,000 in Greek numerals.

See also

• (Greek-script letters) Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ, Ο ο, Π π, Ρ ρ, Σ σ ς, Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω
• (non-Classical letters) Ϝ ϝ, Ͷ ͷ, Ͱ ͱ, Ϻ ϻ, Ϙ ϙ, Ͳ ͳ
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨