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.
Notch maneuver is when an aircraft being tracked by a pulse Doppler radar (whether ground or air intercept radar from an adversary aircraft) flies perpendicular to the radar t â¦ o escape detection and tracking.aking the world better, one answer at a time. think about a tube with a rubber lid as the lid is pushed inside the pressure inside the tube will momentarily go up its the same principle as the aortic valve snaps shut there is a momentary rise in pressure in the aorta.