Origin of thiazine
International Scientific Vocabulary thi- + azine
First Known Use: 1900
Medical Definition of thiazine
: any of various compounds that are characterized by a ring composed of four carbon atoms, one sulfur atom, and one nitrogen atom and include some that are important as dyes and others that are important as tranquilizers—see phenothiazine
Seen and Heard
What made you want to look up thiazine? Please tell us where you read or heard it (including the quote, if possible).