Φ

See also: φ [U+03C6 GREEK SMALL LETTER PHI], ф [U+0444 CYRILLIC SMALL LETTER EF], Ф [U+0424 CYRILLIC CAPITAL LETTER EF], Փ [U+0553 ARMENIAN CAPITAL LETTER PIWR], φ., and 中 [U+4E2D CJK UNIFIED IDEOGRAPH-4E2D]

Φ U+03A6, Φ GREEK CAPITAL LETTER PHI ← Υ [U+03A5] Greek and Coptic Χ → [U+03A7]

Translingual

Symbol

Φ

1. (mathematics) an angle
2. (mathematics) golden ratio conjugate ≈ 0.618...
3. (physics) magnetic flux
4. Phrateres, a non-profit social-service organization for women in North America
5. (linguistics) A wildcard for a pharyngeal consonant

   Synonym: sometimes covered by H

Usage notes

This letter has multiple lowercase forms:

• φ, the form normally used in Modern Greek;
• ϕ, often used as a symbol for various things; or ɸ, the form properly used if denoting a voiceless bilabial fricative (these two forms are, in many fonts, indistinguishable or nearly so; Times New Roman is one font in which they are clearly distinct).
• 𝜙, sometimes used as a symbol.

See also

• Φ on Wikipedia.Wikipedia

Ancient Greek

Etymology

Uncertain; possibly a modification of Ϙ (Q) (koppa) as some cases of Ancient Greek /pʰ/ come from earlier /kʷʰ/.

Letter

Φ • (Ph) (uppercase, lowercase φ)

1. The letter phi (φεῖ), the 21st letter of the ancient Greek alphabet.

Derived terms

• (Cyrillic) Ф
• (Coptic) Ⲫ
• (Armenian) Փ, Ֆ

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

Φ • (F) (uppercase, lowercase φ)

1. The upper case letter phi (φι), the 21st 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) ᾿ ῾ ◌́ ◌̀ ῀ ¨
• Φ΄
• ͵Φ