(ˈdaɪəˌziːn, daɪˈæziːn, -ɪn) or diazin (ˈdaɪəzɪn, daɪˈæzɪn)
noun
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
See also pyrimidine
diazine in American English
(ˈdaɪəˌzin; daɪˈæzˌin; daɪˈæzɪn)
noun
any chemical compound with a molecular structure consisting of four atoms of carbon and two of nitrogen, arranged in a ring; esp., any of the three isomeric compounds having the formula C4H4N2