Ozalid Syllabification: (Oz·a·lid)Pronunciation: /ˈäzəˌlid/Definition of Ozalid noun trademark a photocopy made by a process in which a diazonium salt and coupler are present in the paper coating, so that the image develops in the presence of ammonia. Origin: 1920s: by reversal of diazo and insertion of -lOzalid in other Oxford dictionaries Definition of Ozalid in the British & World English dictionary