When an engine is ignited, it produces thrust and boosts the rocket into the sky. After the propellant is used up, delay is activated, producing tracking smoke and allowing the rocket a brief coast.
infirmary (plural infirmaries) 1  A place where sick or injured people are cared for, especially a small hospital; sickhouse. 2  A clinic or dispensary within another institution.
health facility - building where medicine is practiced. healthcare facility, medical building. building, edifice - a structure that has a roof and walls and stands more or less permanently in one place; there was a three-story building on the corner; it was an imposing edifice. clinic - a healthcare facility for outpatient care. hospital, infirmary - a health facility where patients receive treatment.