Ξ

See also: ξ, ≡, ミ, 三, and Appendix:Variations of "x"

Ξ U+039E, Ξ GREEK CAPITAL LETTER XI ← Ν [U+039D] Greek and Coptic Ο → [U+039F]

Translingual

Symbol

Ξ

1. (particle physics) Xi baryon; cascade particle
   • 2017 August 20, Jon Butterworth, “Newly discovered particles, and what's in them”, in The Guardian‎ (in English):

     Those smaller particles are quarks in this case, meaning that the Ξ_cc⁺⁺ is a hadron—the generic name for particles made of quarks.

Further reading

• Xi (letter) on Wikipedia.Wikipedia

Ancient Greek

Etymology

From Phoenician 𐤎 (s, “śāmek”).

Letter

Ξ • (X) (uppercase, lowercase ξ)

1. The letter xi (ξεῖ), the tenth letter of the ancient Greek alphabet.

Derived terms

• (Cyrillic) Ѯ
• (Coptic) Ⲝ

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 (S) ϻ (s), Ϟ ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨

Greek

Letter

Ξ • (X) (uppercase, lowercase ξ)

1. The upper case letter xi (ξι), the 14th 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 (S) ϻ (s), Ϟ ϟ, Ϙ (Q) ϙ (q), Ͳ (S) ͳ (s)
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨
• Ξ΄
• ͵Ξ