A.U.
The ungrammatical expansion of this abbreviation, aures unitas, given in many reference works, is entirely without historical foundation. The JCAHO directs that each ear or both ears be written in full to avoid confusion with similar abbreviations.Abbreviation for auris utraque [L.], each ear or both ears.
Farlex Partner Medical Dictionary © Farlex 2012
A.U.
Abbreviation for auris utraque
each ear or both ears. usage note The ungrammatical expansion of this abbreviation, aures unitas, given in many reference works, is entirely without historical foundation. The JCAHO directs that each ear or both ears be written in full to avoid confusion with similar abbreviations.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012