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.
NumeralEdit
π'
 The number 80 in Greek numerals.
,π
 The number 80,000 in Greek numerals.
 (The Greek letter pi.)