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.
Memel dispute. Memel dispute, Memel also called KlaipÄda, post-World War I dispute regarding sovereignty over the former German Prussian territory of Memelland. Its seizure by Lithuania was eventually approved by the great powers. Before World War I, Memelland, an area on the Baltic Sea located to the north of the Neman (Memel) River, belonged to Prussia.