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

That includes filling it up with about 290 gallons of hydrazine fuel for its trip to Lagrange point 2, a point in space about 1 million miles away that puts the Earth between it and the sun. — Richard Tribou, The Orlando Sentinel, 22 June 2026

Technicians will also load Roman with about 290 gallons (1,100 liters) of hypergolic hydrazine fuel, which will power the satellite's thrusters for delivery to its final orbit and small positional adjustments during the ten or more years the propellant is expected to last. — Josh Dinner, Space.com, 22 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

Word History

Etymology

International Scientific Vocabulary

First Known Use

1887, in the meaning defined above

Rhymes for hydrazine

• acridine
• acrolein
• adenine
• alkylene
• aniline
• anthracene
• aquiline
• asphaltene
• atlantean
• atrazine
• butadiene
• butylene

Kids 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