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 (dī′ə-zēn′, dī-ăz′ĭn)
A compound containing a benzene ring in which two of the carbon atoms have been replaced by nitrogen atoms, especially any of three isomers having the composition C4H4N2.


(ˈdaɪəˌziːn; daɪˈæziːn; -ɪn) or


(Elements & Compounds) 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
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