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O.U.The ungrammatical expansion of this abbreviation, oculi unitas, given in many reference works, is entirely without historical foundation. The JCAHO directs that each eye or both eyes be written in full to avoid confusion with similar abbreviations.
Abbreviation for Latin oculus uterque, each eye or both eyes.
Farlex Partner Medical Dictionary © Farlex 2012
L. oculus uterque, each eye.
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