A rocket, powered by solid fuel, that is not lit while on the ground but first carried into the upper atmosphere by a gas-filled balloon, then separated from the balloon and automatically ignited to allow it to achieve a higher altitude.
rocketeer
Somebody who designs, launches, operates, or travels in a rocket.
“But no script can hope to match the life of the German rocketeer behind the experiment whose real story is revealed today for the first time.”
“The rookie rocketeer instinctively hit the right breaker and all power was restored.”
“After its initial rendezvous, the spacecraft will spend five months near the asteroid named after the late rocketeer Hideo Itokawa, father of Japan's space program.”
rocketry
The making and launching of rockets, its science and practice.