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   pi

   /pʌɪ/

   noun

   • 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

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

   Word Origin Greek.

   Scrabble Points: 4

   • P

     3

   • I

     1

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