oxytetracycline Syllabification: (ox·y·te·tra·cy·cline)Pronunciation: /ˌäksəˌtetrəˈsīklēn/Definition of oxytetracycline noun Medicine an antibiotic related to tetracycline, used to treat a variety of bacterial infections. oxytetracycline in other Oxford dictionaries Definition of oxytetracycline in the British & World English dictionary