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.
Tuberculosis: an infectious disease that is characterized by the formation of tubercles on the lungs and other tissues of the body. A tubercle is a nodule or swelling, especially a mass of lymphocytes (white blood cells) and epithelioid cells (cells that resemble epithelium) that form the wound of tuberculosis.