"Rocket propulsion" refers to the process of using force to make a rocket move forward in space. It involves a powerful engine that pushes out gases at high speeds, creating a reaction force that propels the rocket forward. Full definition
Designing and manufacturing a static test system for developing bi-propellant rocket propulsion systems (jobhero.com)
A spaceplane is quite simply a vehicle that can fly as both an airplane in the atmosphere — generating lift from its wings — and as a spacecraft in a vacuum using rocket propulsion. (americaspace.com)
James» first project at Southern Research involved working with red fuming nitric acid — a corrosive, combustible concoction used for rocket propulsion. (southernresearch.org)