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.
An Intensive Care Unit (ICU) is a special facility within a hospital that is dedicated to treating patients who are critically ill. The patients may be experiencing multiple organ failure, respiratory arrest, or other serious problems that require intensive monitoring.