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 Epley maneuver is a simple treatment for the relief of a type of vertigo known as benign paroxysmal positional vertigo (BPPV). It is considered as a treatment option if the vertigo is being caused by deposits in the ear's organ of balance.