Noun
reaction propulsion using stored oxygen for combustion; used where there is insufficient atmospheric oxygen
Source: WordNetThe Reaction Research Society (RRS), although known primarily for their work with liquid rocket propulsion, has a long history of research and development with hybrid rocket propulsion. Source: Internet
While Alice remains inside the station, continuing to orbit with it as before, Bob uses a rocket propulsion system to cease orbiting and hover where he was. Source: Internet