pyridazine
noun
py·rid·azine
| \ pīˈridəˌzēn, ˌpirəˈdaˌz-, -zə̇n\
Definition of pyridazine
1
: a liquid feeble heterocyclic base C4H4N2; 1,2-diazine
— called also ortho-diazine
2
: a derivative of pyridazine
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