hydrazine
noun
hy·dra·zine
ˈhī-drə-ˌzēn 
: a colorless fuming corrosive strongly reducing liquid base N2H4 used especially in fuels for rocket and jet engines
also
: an organic base derived from this compound
Examples of hydrazine in a Sentence
Recent Examples on the Web
The fuel is marketed as greener, or less toxic, than the usual high-efficiency hydrazine that is perfect for making big maneuvers in space but is dangerous to handle.
—
Elizabeth Howell, Space.com, 9 June 2026
The breakthrough came from the US Air Force, which had spent years developing a propellant called ASCENT (Advanced SpaceCraft Energetic Non-Toxic propellant) as a greener replacement for hydrazine, a highly toxic chemical traditionally used in spacecraft propulsion.
—Omar Kardoudi
june 05, New Atlas, 5 June 2026
Ranger will carry 4,000 kg of hydrazine propellant on board to enable rapid maneuvering.
—Eric Berger, ArsTechnica, 7 May 2026
The crew module has been powered down for recovery, and members of the recovery crew are approaching the capsule and performing a sweep with air quality sensors to make sure no hazardous fumes, such as hydrazine propellant or ammonia coolant, are leaking from the spacecraft.
—Miles Doran, CBS News, 10 Apr. 2026
See All Example Sentences for hydrazine
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Elizabeth Howell, Space.com, 9 June 2026
The breakthrough came from the US Air Force, which had spent years developing a propellant called ASCENT (Advanced SpaceCraft Energetic Non-Toxic propellant) as a greener replacement for hydrazine, a highly toxic chemical traditionally used in spacecraft propulsion.
—Omar Kardoudi
june 05, New Atlas, 5 June 2026
Ranger will carry 4,000 kg of hydrazine propellant on board to enable rapid maneuvering.
—Eric Berger, ArsTechnica, 7 May 2026
The crew module has been powered down for recovery, and members of the recovery crew are approaching the capsule and performing a sweep with air quality sensors to make sure no hazardous fumes, such as hydrazine propellant or ammonia coolant, are leaking from the spacecraft.
—Miles Doran, CBS News, 10 Apr. 2026
See All Example Sentences for hydrazine
Cite this Entry
“Hydrazine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrazine. Accessed 13 Jun. 2026.
Copy CitationKids Definition
hydrazine
noun
hy·dra·zine
ˈhī-drə-ˌzēn
: a colorless fuming liquid used especially in fuels for rocket engines
Medical Definition
hydrazine
noun
hy·dra·zine
ˈhī-drə-ˌzēn
: a colorless fuming corrosive strongly reducing liquid base N2H4 used in the production of various materials (as pharmaceuticals and plastics)
also
: an organic base derived from this compound
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