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Assyria
(Encyclopedia)CE5 Assyrian Empire (c.650 b.c.) Assyria əsĭrˈēə [key], ancient empire of W Asia. It developed around the city of Ashur, or Assur, on the upper Tigris River and south of the later capital, Ni...laser
(Encyclopedia)CE5 Ordinary light sources produce incoherent light, while a laser produces a beam of coherent light. laser [acronym for light amplification by stimulated emission of radiation], device for the cr...Bismarck, Otto von
(Encyclopedia)Bismarck, Otto von bĭzˈmärk, Ger. ôˈtō fən bĭsˈmärk [key], 1815–98, German statesman, known as the Iron Chancellor. The Bismarckian era closed with the death of Emperor Frederick III. A ...Sahara
(Encyclopedia)Sahara səhârˈə [key] [Arab.,=desert], world's largest desert, c.3,500,000 sq mi (9,065,000 sq km), N Africa; the western part of a great arid zone that continues into SW Asia. Extending more than ...dinosaur
(Encyclopedia)dinosaur dīˈnəsôr [key] [Gr., = terrible lizard], extinct land reptile of the Mesozoic era. The dinosaurs, which were egg-laying animals, ranged in length from 21⁄2 ft (91 cm) to about 127 f...Churchill, Sir Winston Leonard Spencer, British statesman, soldier, and author
(Encyclopedia)Churchill, Sir Winston Leonard Spencer, 1874–1965, British statesman, soldier, and author; son of Lord Randolph Churchill. Churchill was undoubtedly one of the greatest public figures of the 20t...hydrogen
(Encyclopedia)hydrogen hīˈdrəjən [key] [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14℃; b.p. −252.87℃; density 0.08...free trade
(Encyclopedia)free trade, in modern usage, trade or commerce carried on without such restrictions as import duties, export bounties, domestic production subsidies, trade quotas, or import licenses. The basic argume...embryo
(Encyclopedia)CE5 Development of the human embryo embryo ĕmˈbrēō [key], name for the developing young of an animal or plant. In its widest definition, the embryo is the young from the moment of fertilizatio...computer
(Encyclopedia)CE5 Schematic diagram of a computer system: Data flow is indicated by solid lines; control signals are indicated by dashed lines. computer, device capable of performing a series of arithmetic or l...Browse by Subject
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