Merriam-Webster's Collegiate® Dictionary, 11th Edition
PIE
I. noun
Etymology: Middle English, from Anglo-French, from Latin pica; akin to Latin picus woodpecker, Old High German speh
Date: 13th century
magpie ,
II. noun
Etymology: Middle English
Date: 14th century
a meat dish baked with biscuit or pastry crust, a dessert consisting of a filling (as of fruit or custard) in a pastry shell or topped with pastry or both,
3. affair , business , a whole regarded as divisible into shares , see: pi