χ

See also: Χ, ꭓ, and Appendix:Variations of "x"

χ U+03C7, χ GREEK SMALL LETTER CHI ← φ [U+03C6] Greek and Coptic ψ → [U+03C8]

ᵡ U+1D61, ᵡ MODIFIER LETTER SMALL CHI ← ᵠ [U+1D60] Phonetic Extensions ᵢ → [U+1D62]

𝜒 U+1D712, 𝜒 MATHEMATICAL ITALIC SMALL CHI ← 𝜑 [U+1D711] Mathematical Alphanumeric Symbols 𝜓 → [U+1D713]

Translingual

Alternative forms

• (IPA): ꭓ

Pronunciation

• IPA

  (file)

Symbol

χ

1. (IPA) a voiceless uvular fricative.

   (superscript ⟨ᵡ⟩) [χ]-fricated release of a plosive, sometimes implying an affricate; [χ]-coloring, or a weak, fleeting or epenthetic [χ].

2. (mathematics) characteristic function (any meaning) or characteristic polynomial

Usage notes

• Not to be confused with κ (k) (the cursive kappa).

See also

• χ on Wikipedia.Wikipedia
• Voiceless uvular fricative on Wikipedia.Wikipedia

Ancient Greek

Etymology

Derived from its majuscule counterpart Χ.

Letter

χ • (kh) (lowercase, uppercase Χ)

1. Lower-case chi (χεῖ), the 22nd letter of the ancient Greek alphabet. It represented the voiceless aspirated velar plosive /kʰ/ and later the voiceless velar fricative /x/. It is preceded by φ and followed by ψ.

Derived terms

See also chi

• χ΄, ͵χ
• х, Х (Cyrillic)
• 𐍇 (Gothic)
• ⲭ, Ⲭ (Coptic)

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) ᾿ ῾ ◌́ ◌̀ ῀ ¨

Greek

Letter

χ • (ch) (lowercase, uppercase Χ)

1. The lower case letter chi (χι), the 22nd 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 ϝ, Ͷ ͷ, Ͱ ͱ, Ϻ ϻ, Ϙ ϙ, Ͳ ͳ
• (punctuation) · ;
• (diacritics) ᾿ ῾ ◌́ ◌̀ ῀ ¨
• χ΄
• ͵χ