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diatom
diatomaceous earth
diatomic
diatomite
diatonic
diatribe
diatropism
diazepam
diazine
diazo
diazole
diazonium salt
diazotize
diazotype
dib
dibasic
dibber
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diazine

di·a·zine [ d ə zn, dī ázzin ] (plural di·a·zines)


noun 
Definition:
 
carbon and nitrogen compound: a chemical compound in which the molecules contain a hexagonal ring of four carbon atoms and two nitrogen atoms, existing in three isomeric forms. C4N2H4

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