Pi

What is Pi?

Pi definition and meaning on Dictionary terms:
noun, plural pis.
the 16th letter of the Greek alphabet (II, ?).
the consonant sound represented by this letter.
Mathematics. the letter ?, used as the symbol for the ratio of the circumference of a circle to its diameter. the ratio itself: 3.141592+.

 

reference: https://www.dictionary.com/browse/pi

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