Pyo- Definition
 pīō, pīə 
    prefix
  
 Pus.
 Pyogenic.
 American Heritage 
    affix
  
 Pus.
 Pyogenesis.
 Webster's New World 
Suppurative.
 Pyosis.
 Webster's New World 
Origin of Pyo-
-  Greek puo- from puon pus pū̆- in Indo-European roots From American Heritage Dictionary of the English Language, 5th Edition 
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