designed to help correct or ameliorate the discomfort of disorders of the spine and joints: orthopaedic mattresses Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Â© William Collins Sons & Co. Ltd. 1979, 1986 Â© HarperCollins
Definition of Immelmann. : a maneuver in which an airplane reverses direction by executing half of a loop upwards followed by half of a roll âcalled also Immelmann turn.
The Heimlich Maneuver is a first-aid technique for someone who is choking because food or another swallowed object is obstructing his or her airway. Using an upward abdominal â¦ thrust, the Heimlich maneuver compresses the lungs and forces air up into the windpipe (trachea).