thiazine Syllabification: (thi·a·zine)Pronunciation: /ˈTHīəˌzēn/Definition of thiazine noun any of a class of molecules containing a ring of one nitrogen, one sulfur, and four carbon atoms, used in dyes and more recently in sedatives. Origin: late 19th century: from thio- + azinethiazine in other Oxford dictionaries Definition of thiazine in the British & World English dictionary
