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per- Definition

per- (pʉr)

  1. through, throughout perfoliate, peroral
  2. thoroughly, completely, very perfervid
  3. Chem.
    1. containing a specified element or radical in its maximum, or a relatively high, valence perchloric acid
    2. containing the maximum amount of the indicated element perfluoropropane (completely fluorinated propane, CF)
    3. containing the divalent group O peracid

Etymology: L < per, through: see per