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.
Definition: Bariatrics is the branch of medicine that deals with the study and treatment of obesity, including prevention of obesity and treatments for obesity, which may include surgical procedures. The word bariatrics derives from the Greek root baro, which means heavy or large.