hy·dra·zine
n.
A colorless, fuming, corrosive hygroscopic liquid, H2NNH2, used in jet and rocket fuels.
 
Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

hydrazine

\Hy"dra*zine\, n. [Hydr- + azo- + -ine.] (Chem.) Any one of a series of nitrogenous bases, resembling the amines and produced by the reduction of certain nitroso and diazo compounds; as, methyl hydrazine, phenyl hydrazine, etc. They are derivatives of hydrazine proper, H2N.NH2, which is a doubled amido group, recently (1887) isolated as a stable, colorless gas, with a peculiar, irritating odor. As a base it forms distinct salts. Called also diamide, amidogen, (or more properly diamidogen), etc.

Source: Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.

hydrazine

n : a colorless fuming corrosive liquid; used chiefly in rocket fuels

Source: WordNet ® 1.6, © 1997 Princeton University