π

π U+03C0, π GREEK SMALL LETTER PI ← ο Greek and Coptic ρ →

Translingual

Symbol

π

1. (mathematics) Pi, an irrational constant representing the ratio of the circumference of a circle to its diameter; approximately 3.14159265.
2. (particle physics) pion, pi meson
3. (mathematics) homotopy group
4. (mathematics) prime-counting function
5. (linguistics, rare) A voiceless labiodental plosive (p̪).

See also

• π on Wikipedia.Wikipedia

Ancient Greek

Etymology

Derived from its majuscule counterpart Π.

Letter

π • (p) (lowercase, uppercase Π)

1. Lower-case pi (πεῖ), the 16th letter of the ancient Greek alphabet. It represented the voiceless unaspirated bilabial plosive /p/. It is preceded by ο and followed by ρ.

Derived terms

See also pi

• π΄, ͵π
• п, П (Cyrillic)
• 𐍀 (Gothic)
• ⲡ, Ⲡ (Coptic)
• ∏ (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

π • (p) (lowercase, uppercase Π)

1. The lower case letter pi (πι), the 16th letter of the modern Greek alphabet.

See also

• π΄
• ͵π
• Appendix:Greek alphabet