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.
A urinary(YOOR-uh-nair-ee) tract infection (UTI) is an infection anywhere in the urinary tract. The urinary tract makes and stores urine and removes it from the body. UTIs are easily treated with antibiotics, but untreated UTIs can damage your kidneys.