ˈhīdrəˌzēn, -_zə̇n noun
( -s )
Etymology: International Scientific Vocabulary hydr- + az- + -ine; originally formed as German hydrazin
: a colorless fuming corrosive strongly reducing liquid compound NH 2 NH 2 that is a weaker base than ammonia, that is usually made by dehydration of hydrazine hydrate, and that is used chiefly as a component of fuels for rocket and jet engines and in making salts (as the sulfates) and organic derivatives ; also : an organic base (as phenylhydrazine) derived from this compound