φ

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See also: Φ , ф , Ф , Փ , and φ.

φ	U+03C6, φ GREEK SMALL LETTER PHI

Greek and Coptic

Character variations

𝜑	U+1D711, 𝜑 MATHEMATICAL ITALIC SMALL PHI

Mathematical Alphanumeric Symbols

Translingual

Etymology 1

Named by mathematician Mark Barr after Ancient Greek Φειδίας (Pheidías) (Phidias), who supposedly used the golden ratio in his work.

Symbol

φ

English Wikipedia has an article on:

golden ratio

(mathematics) The golden ratio, an irrational number with a value of approximately 1.618033988 which expresses the relationship that the sum of two quantities is to the larger quantity as the larger is to the smaller.

Etymology 2

Symbol

φ

(mathematics) Euler's totient function, an arithmetic function that counts totatives
(UPA) a voiceless labiodental fricative (IPA ).

Ancient Greek

Etymology

Derived from its majuscule counterpart Φ.

Letter

φ • (ph) (lowercase, uppercase Φ)

Lower-case phi (φεῖ), the 21st letter of the ancient Greek alphabet. It represented the voiceless aspirated bilabial plosive /pʰ/ and later the voiceless labiodental fricative /f/. It is preceded by υ and followed by χ.

Derived terms

See also phi

φ΄, ͵φ
ф, Ф (Cyrillic)
փ, Փ, ֆ, Ֆ (Armenian)
ⲫ, Ⲫ (Coptic)
ɸ (IPA)
ϕ (mathematical symbol)

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) (lowercase, uppercase Φ)

The lower 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

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