π
See also: Π [U+03A0 GREEK CAPITAL LETTER PI], ∏ [U+220F NARY PRODUCT], ㄇ [U+3107 BOPOMOFO LETTER M], 丌 [U+4E0C CJK UNIFIED IDEOGRAPH4E0C], ㅠ [U+3160 HANGUL LETTER YU], and Appendix:Variations of "p"

TranslingualEdit
SymbolEdit
π
 (mathematics) An irrational constant representing the ratio of the circumference of a circle to its diameter; approximately 3.14159265.
 (particle physics) pion, pi meson
 (mathematics) homotopy group
 (mathematics) primecounting function
See alsoEdit
GreekEdit
LetterEdit
π • (p) (lowercase, uppercase Π)
 The lower case letter pi (πι), the 16th letter of the modern Greek alphabet.
See alsoEdit
 π΄ (p΄)
 ͵π (͵p)
 Appendix:Greek alphabet