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[hahy-druh-zeen] /ˈhaɪ drəˌzin/
Also called diamine. a colorless, oily, fuming liquid, N 2 H 4 , 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.
a class of substances derived by replacing one or more hydrogen atoms in hydrazine by an organic group.
Origin of hydrazine
1885-90; hydr-2 + az- + -ine2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hydrazine
  • The spacecraft contains hydrazine, a rocket fuel, according to a government official who spoke on condition of anonymity.
  • Cartwright said it was unlikely that the fireball could have been caused by anything other than the hydrazine in the tank.
  • Given that there's no fuel, that would indicate that there's a hydrazine fire.
  • It's made using extremely toxic, caustic hydrazine and is highly unstable.
  • They shot it down due to the hydrazine risk, and chose the location as a good demonstration to anyone who might be watching.
  • Evidently a valve in the hydrazine system failed to open for some reason.
  • hydrazine is highly reactive and easily catches fire.
  • hydrazine and hydrazine derivatives find use as rocket fuels and monopropellants.
British Dictionary definitions for hydrazine


/ˈhaɪdrəˌziːn; -zɪn/
a colourless basic liquid made from sodium hypochlorite and ammonia: a strong reducing agent, used chiefly as a rocket fuel. Formula: N2H4
Word Origin
C19: from hydro- + azo- + -ine²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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hydrazine in Science
  (hī'drə-zēn', -zĭn)   
A colorless, fuming, corrosive liquid with an odor like ammonia that is a powerful reducing agent. It can be combined with organic compounds to form jet and rocket fuels and is also used to make explosives, fungicides, medicines, and photographic chemicals. Chemical formula: N2H4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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