σ

See also: ς, Σ, σ., and σ'

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

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

Alternative forms

• ς (s) (only at the end of a word)

Letter

σ • (s) (lowercase, uppercase Σ)

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

See also

• (Greek-script letters) Α α (A a), Β β (B b), Γ γ (G g), Δ δ (D d), Ε ε (E e), Ζ ζ (Z z), Η η (Ē ē), Θ θ (Th th), Ι ι ℩ (I i ℩), Κ κ (K k), Λ λ (L l), Μ μ (M m), Ν ν (N n), Ξ ξ (X x), Ο ο (O o), Π π (P p), Ρ ρ (R r), Σ σ ς (S s s), Τ τ (T t), Υ υ (U u), Φ φ (Ph ph), Χ χ (Kh kh), Ψ ψ (Ps ps), Ω ω (Ō ō)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ´ ` ῀ ¨ ¯ ˘
• σ΄ (s΄)
• ͵σ (͵s)