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Definition of: hydrazine
(hī′drə·zēn, -zin) noun Chem.
1. A colorless fuming liquid, N2H4, derived from diazoacetic acid: used as a reducing agent in organic synthesis and as a fuel in jet engines.
2. One of a group of compounds derived from the foregoing by replacement of one or more hydrogen atoms by another radical: phenyl hydrazine. [<HYDR- + AZ(O) + -INE2]
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