Noun pie has 2 senses
  1. pie - dish baked in pastry-lined pan often with a pastry top
    --1 is a kind of
    pastry
    --1 has particulars:
     tart; deep-dish pie, cobbler; shoofly pie; mince pie; apple pie; lemon meringue pie; blueberry pie; rhubarb pie; pecan pie; pumpkin pie; squash pie; patty; meat pie
  2. Proto-Indo European, PIE - a prehistoric unrecorded language that was the ancestor of all Indo-European languages
    --2 is a kind of Indo-European, Indo-European language, Indo-Hittite
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