See also: Π [U+03A0 GREEK CAPITAL LETTER PI] ,
∏ [U+220F N-ARY PRODUCT] ,
ㄇ [U+3107 BOPOMOFO LETTER M] ,
ㄫ [U+312B BOPOMOFO LETTER NG] ,
丌 [U+4E0C CJK UNIFIED IDEOGRAPH-4E0C] ,
兀 [U+5140 CJK UNIFIED IDEOGRAPH-5140] ,
ㅠ [U+3160 HANGUL LETTER YU] , and Appendix:Variations of "p" Thismosaic is outside the mathematics building at theTechnische Universität Berlin . When a circle'sdiameter is 1unit , itscircumference is π units. When a circle'sradius is 1 unit, its circumference is 2π units. π
( mathematics ) Pi , anirrational constant representing the ratio of thecircumference of a circle to itsdiameter ; approximately 3.14159265.( particle physics ) pion ,pi meson ( mathematics ) homotopy group ( mathematics ) prime-counting function ( UPA ) voiced labial click consonant (IPA[ɡ͜ʘ] ).( phonetics , rare ) voiceless labiodental plosive (p̪ ).Derived from itsmajuscule counterpartΠ .
π • (p ) (lowercase ,uppercase Π
Lower-casepi (πεῖ Greek alphabet . It represented thevoiceless unaspirated bilabial plosive /p/ . It is preceded byο and followed byρ . See alsopi
( 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 ( W ) ϝ ( w ) ,Ͷ ͷ Ͱ ( H ) ͱ ( h ) ,Ϻ ( S ) ϻ ( s ) ,Ϟ ϟ Ϙ ( Q ) ϙ ( q ) ,Ͳ ( S ) ͳ ( s ) ( punctuation ) · ⸳ . ; ( diacritics ) ᾿ ῾ ◌́ ◌̀ ῀ ¨ π • (p ) (lowercase ,uppercase Π
Thelower case letterpi (πι ), the 16th letter of the modernGreek alphabet . 
