πι

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Greek[edit]

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    letter

  όμικρον  
Greek uc pi.pngGreek lc pi.png  following
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Π π   –   English: pi

Etymology[edit]

From the Ancient Greek πεῖ (peî, pi).

Noun[edit]

πι (pin (invariable)

  1. Letter pi
  2. Used in "στο πι και φι" meaning at the drop of a hat.