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per-
- through, throughout: perfoliate, peroral
- thoroughly, completely, very: perfervid
- Chem.
- containing a specified element or radical in its maximum, or a relatively high, valence: perchloric acid
- containing the maximum amount of the indicated element: perfluoropropane (completely fluorinated propane, CF)
- containing the divalent group O: peracidsometimes peroxy-
See per- in American Heritage Dictionary 4
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