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iodine
(Encyclopedia)iodine īˈədīn, –dĭn [key] [Gr.,=violet], nonmetallic chemical element; symbol I; at. no. 53; at. wt. 126.90447; m.p. 113.5℃; b.p. 184.35℃; sp. gr. 4.93 at 20℃; valence −1, +1, +3, +5, o...Chouteau
(Encyclopedia)Chouteau sho͞otōˈ [key], family of American fur traders. René Auguste Chouteau, 1749–1829, b. New Orleans, accompanied (1763) his stepfather, Pierre Laclede, on a trading expedition to the Illin...Boone, Daniel
(Encyclopedia)Boone, Daniel, 1734–1820, American frontiersman, b. Oley (now Exeter) township, near Reading, Pa. The Boones, English Quakers, left Pennsylvania in 1750 and settled (1751 or 1752) in the Yadkin vall...Wilkinson, James
(Encyclopedia)Wilkinson, James, 1757–1825, American general and one of the most corrupt and devious officers in the nation's early army, b. Calvert co., Md. Abandoning his medical studies in 1776 to join the army...Humboldt, Alexander, Freiherr von
(Encyclopedia)Humboldt, Alexander, Freiherr von hŭmˈbōlt, Ger. älĕksänˈdər frīˈhĕr fən ho͝omˈbôlt [key], 1769–1859, German naturalist, inventor, explorer, and author, the most eminent scientist of ...Oxford, University of
(Encyclopedia)Oxford, University of, at Oxford, England, one of the oldest English-language universities in the world. The university was a leading center of learning throughout the Middle Ages; such scholars as Ro...engineering
(Encyclopedia)engineering, profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life. Until the Industrial Revolution there were only t...Cenozoic era
(Encyclopedia)Cenozoic era sēnəzōˈĭk, sĕn– [key], last major division of geologic time (see Geologic Timescale, tablegeologic timescale, table) lasting from 65 million years ago to the present. The Cenozoic...Iowa, state, United States
(Encyclopedia) CE5 Iowa īˈəwə [key], midwestern state in the N central United States. It is bounded by the Mississippi River, across which lie Wisconsin and Illinois (E); Missouri (S); Nebraska and South Dako...Tay-Sachs disease
(Encyclopedia)Tay-Sachs disease tāˈ-săksˈ [key], rare hereditary disease caused by a genetic mutation that leaves the body unable to produce an enzyme necessary for fat metabolism in nerve cells, producing cent...Browse by Subject
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