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.
Intermediate Care Facility (ICF). Intermediate care facility is a health facility, or a distinct part of a hospital or skilled nursing facility which provides inpatient care to patients who have need for skilled nursing supervision and need supportive care, but who do not require continuous nursing care.