Dictionary![]() ![]() hy•dra•zinePronunciation: (hī'dru-zēn"), [key] —n. 1. Also called diamine. a colorless, oily, fuming liquid, N2H4, that is a weak base in solution and forms a large number of salts resembling ammonium salts: used chiefly as a reducing agent and a jet-propulsion fuel. 2. a class of substances derived by replacing one or more hydrogen atoms in hydrazine by an organic group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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