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.
Surgery (from the Greek: ÏÎµÎ¹ÏÎ¿ÏÏÎ³Î¹ÎºÎ® cheirourgikÄ (composed of ÏÎµÎ¯Ï, hand, and á¼ÏÎ³Î¿Î½, work), via Latin: chirurgiae, meaning hand work) is a medical specialty that uses operative manual and instrumental techniques on a patient to investigate or treat a pathological condition such as a disease or injury, to help improve bodily function or appearance or to repair unwanted ruptured areas.