1. Rocket or spacecraft propellants that consist of a single chemical substance or homogeneous mixture, which decompose or react to produce thrust without requiring a separate oxidizer.
Usage: technical; aerospace engineering; plural form

Examples

• Hydrazine is one of the most common monopropellants used in satellite propulsion systems.
• Monopropellants offer simplicity in spacecraft design because they eliminate the need for separate fuel and oxidizer tanks.
• The spacecraft's thrusters relied on monopropellants for attitude control and orbital maneuvers.
• Engineers selected monopropellants for this mission due to their thermal stability and reliability.
• Unlike bipropellants, monopropellants decompose through catalytic reaction to generate thrust.