|diazine or diazin (ˈdaɪəˌziːn, daɪˈæziːn, -ɪn, ˈdaɪəzɪn, daɪˈæzɪn)|
|See also pyrimidine any organic compound whose molecules contain a hexagonal ring of four carbon atoms and two nitrogen atoms, esp any of three isomers with the formula C4N2H4|
|diazin or diazin|
diazine di·a·zine (dī'ə-zēn', dī-āz'ĭn)
A compound containing a benzene ring in which two of the carbon atoms have been replaced by nitrogen atoms.