Ο

See also: ο, -ο, -Ο, -ό, ὅ, ὁ, and Appendix:Variations of "o"

Ο U+039F, Ο GREEK CAPITAL LETTER OMICRON ← Ξ [U+039E] Greek and Coptic Π → [U+03A0]

Translingual

Symbol

Ο

1. originally used as a symbol for Big O notation, representing the asymptotic rate of growth of a function in mathematics

See also

• Ο on Wikipedia.Wikipedia

Ancient Greek

Etymology

From Phoenician 𐤏 (ʿ, “ʿayin”).

Letter

Ο • (O) (uppercase, lowercase ο)

1. The letter omicron (ὂ μικρόν), the 15th letter of the ancient Greek alphabet.

Derived terms

• (Cyrillic) О
• (Coptic) Ⲟ
• (Gothic) 𐌿

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 (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (Ś) ϻ (ś), Ϟ, ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨

Greek

Letter

Ο • (O) (uppercase, lowercase ο)

1. The upper case letter omicron (όμικρον), the 15th letter of the modern Greek alphabet.

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 (W) ϝ (w), Ͷ ͷ, Ͱ (H) ͱ (h), Ϻ (Ś) ϻ (ś), Ϟ, ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨
• Ο΄
• ͵Ο