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1. Oxford American Dictionary

   pi

   • IPA[pī]

   美式

   • n.
     the sixteenth letter of the Greek alphabet (Π, π), transliterated as ‘p.’.；the numerical value of the ratio of the circumference of a circle to its diameter (approximately 3.14159).
   • symbol
     the numerical value of pi.；osmotic pressure.
2. • 釋義
   • 相關詞

   n.

   名詞

   • 1. the sixteenth letter of the Greek alphabet (Π, π), transliterated as ‘p.’.
   • ▪ the numerical value of the ratio of the circumference of a circle to its diameter (approximately 3.14159).
   • ▪ the sixteenth star in a constellation Pi Herculis
   • ▪ relating to or denoting an electron or orbital with one unit of angular momentum about an internuclear axis the π orbital system of the benzene molecule

   symbol

   symbol

   • 1. the numerical value of pi.
   • 2. osmotic pressure.
   • 3. mathematical product.

   pi-meson

   • n.
     another term for pion

   Oxford Dictionary

   pi-jaw

   • n.
     tediously moralizing talk.

   Oxford Dictionary

   pi meson

   • n.
     another term for pion

   Oxford American Dictionary

3. • 更多解釋

   pi

   • IPA[pʌɪ]

   英式

   • n.
     the sixteenth letter of the Greek alphabet (Π, π), transliterated as ‘p’.
   • symbol
     the numerical value of pi.

   Oxford Dictionary

   pi

   • IPA[pʌɪ]

   英式

   • adj.
     short for pious

   Oxford Dictionary

   PI

   • abbr
     private investigator.

   Oxford American Dictionary

   pi

   • IPA[pī]

   美式

   • adj.
     short for pious

   Oxford American Dictionary