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.
Department of Sociology. University of Nevada, Reno. Health and Medicine.  Medicine  the social institution that involves a societys organized ways of dealing with sickness and injury. - Back in 1941, international health experts identified three components of health: physical, mental, and social.