One of the mysteries of the English language finally explained.
A weakly basic, liquid, heteroaromatic compound which is a diazine with the nitrogen atoms at adjacent positions in the ring; any substituted derivative of this compound.
Late 19th century; earliest use found in Henry Forster Morley (b. 1855). From German Pyridazin from pyrid- (in Pyridin) + -azin, after -pyridazin-.
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