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Menno Simons
Menno Simons , 1496?-1561, Dutch religious reformer. The name of the Mennonites was derived from his name, although he was not the actual founder of the sect. In 1524 he became a Roman Catholic priest but in 1536 he left the church when he announced that he no longer believed in infant baptism and...
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Smithson Tennant
Smithson Tennant 1761-1815, English chemist. In 1796 he proved, by burning a diamond, that the diamond consists solely of carbon. In 1804 he announced his discovery of osmium and iridium.
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clone
clone group of organisms, all of which are descended from a single individual through asexual reproduction, as in a pure cell culture of bacteria. Except for changes in the hereditary material that come about by mutation , all members of a clone are genetically identical. Laboratory experiments in...
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electronics
electronics science and technology based on and concerned with the controlled flow of electrons or other carriers of electric charge, especially in semiconductor devices. It is one of the principal branches of electrical engineering . The invention of the transistor, announced in 1948, and the...
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Hatshepsut
Hatshepsut , d. 1458 BC, ruler of ancient Egypt, of the XVIII dynasty; eldest daughter of Thutmose I . She managed to rule Egypt by relegating her husband (and younger half-brother), Thutmose II (see under Thutmose I ), to the background during his brief reign. After his death, she continued in po...
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superconductivity
superconductivity abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Kamerlingh Onnes, who found that the resistance of mercury dropped suddenly to zero at a temperature of about 4.2°K. For the next 75 years there followed a rather steady str...
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poster
poster placard designed to be posted in some public place for purposes of commercial announcement or propaganda. Advertising makes wide use of posters, as do charitable and political organizations. In ancient civilizations a simple form of written public announcement was used. The invention of prin...
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Malcolm X
Malcolm X,
born Malcolm Little; later adopted the name El‐Hajj Malik El‐Shabazz (1925–1965),
African American
leader.As a thinker, activist, and especially an icon, Malcolm X was perhaps the most important black nationalist figure in postȁ...
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Ted Turner
Ted Turner (Robert Edward Turner 3d), 1938-, American television network executive, b. Cincinnati. After inheriting his father's billboard company, he founded (1976) a television station, WTBS, and built it into the Turner Broadcasting System (TBS). He pioneered "superstation" broadcasting, in ...
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Jan Masaryk
Jan Masaryk , 1886-1948, Czechoslovak diplomat, son of Thomas G. Masaryk. He was (1925-38) Czechoslovak minister to Great Britain, and in London he became (1940) foreign minister in the Czechoslovak government in exile headed by Eduard Beneš after the German occupation of Czechoslovakia. Duri...
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