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Einstein, Albert

(Encyclopedia)Einstein, Albert īnˈstīn [key], 1879–1955, American theoretical physicist, known for the formulation of the relativity theory, b. Ulm, Germany. He is recognized as one of the greatest physicists ...

electronic music

(Encyclopedia)electronic music or electro-acoustic music, term for compositions that utilize the capacities of electronic media for creating and altering sounds. Initially, a distinction must be made between the te...

Frederick I, Holy Roman emperor and German king

(Encyclopedia)Frederick I or Frederick Barbarossa bärbərôsˈə [key] [Ital.,=red beard], c.1125–90, Holy Roman emperor (1155–90) and German king (1152–90), son of Frederick of Hohenstaufen, duke of Swabia,...

Moravia

(Encyclopedia)Moravia mərāˈvēə, mō– [key], Czech Morava, Ger. Mähren, region in the E Czech Republic. The region is bordered on the W by Bohemia, on the E by the Little and White Carpathian Mts., which div...

German literature

(Encyclopedia)German literature, works in the German language by German, Austrian, Austro-Hungarian, and Swiss authors, as well as by writers of German in other countries. The postwar decades saw a gradual litera...

air forces

(Encyclopedia)air forces, those portions of a nation's military organization employing heavier-than-air aircraft for reconnaissance, support of ground troops, aerial combat, and bombing of enemy lines of communicat...

war crimes

(Encyclopedia)war crimes, in international law, violations of the laws of war (see war, laws of). Those accused have been tried by their own military and civilian courts, by those of their enemy, and by expressly e...

aviation

(Encyclopedia)aviation, operation of heavier-than-air aircraft and related activities. Aviation can be conveniently divided into military aviation, air transport, and general aviation. Military aviation includes al...

William II, emperor of Germany and king of Prussia

(Encyclopedia)William II, 1859–1941, emperor of Germany and king of Prussia (1888–1918), son and successor of Frederick III and grandson of William I of Germany and of Queen Victoria of England. After the out...

internal-combustion engine

(Encyclopedia)CE5 Internal-combustion engines: In the four-stroke reciprocating engine (above), a mixture of fuel and air is taken into the chamber on the down-stroke of the piston, is compressed on the up-strok...