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Pronunciation: pi


  1. The 16th letter of the Greek alphabet.
  2. (?). Symbol for osmotic pressure; in mathematics, symbol for the product of a series.
  3. (p). Symbol for the ratio of the circumference of a circle to its diameter (approximately 3.14159).
  4. Symbol for pros.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.