n 1  :  protected by a trademark or a trade name so as to establish proprietary rights analogous to those conveyed by a patent  :  PROPRIETARY < drugs>   2  :  affording free passage  :  being open and unobstructed <the nose with no pathological discharge -Jour. Amer. Med. Assoc.>  .
 
 Brit usu   
 
Similar sounding terms:  pa·tient  po·tent  pudenda  pudendi 
 
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