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thunder
(Encyclopedia)thunder, sound produced along a path of a lightning flash, caused by the rapid heating and expansion of the adjacent air; lightning can heat air to temperatures as much as five times hotter than those...timberline
(Encyclopedia)timberline, elevation above which trees cannot grow. Its location is influenced by the various factors that determine temperature, including latitude, prevailing wind directions, and exposure to sunli...Whittingham, Charles
(Encyclopedia)Whittingham, Charles hwĭtˈĭnjəm, –ĭng-əm [key], 1767–1840, English printer. He established a printery in London in 1789, removing to Chiswick and founding the Chiswick Press in 1810. He was ...Virunga
(Encyclopedia)Virunga vēro͝ongˈgä [key], volcanic range of mountains, E Congo, N Rwanda, and SW Uganda, central Africa, NE of Lake Kivu. It extends along the eastern rim of the Great Rift Valley and separates t...Vosges, mountain range, France
(Encyclopedia)Vosges vōzh [key], mountain range, E France, between the Alsatian plain in the east and the plateau of S Lorraine in the west. It extends generally north and parallel to the Rhine River for c.120 mi ...tick
(Encyclopedia)tick, small, parasitic arachnid of the order Ixodida, closely related to the mites. Ticks, which are larger than the often microscopic mites, are all parasitic in at least one developmental stage; mos...Bannock
(Encyclopedia)Bannock bănˈək [key], Native North Americans who formerly ranged over wide territory of the N Great Plains and into the foothills of the Rocky Mts. They were concentrated in S Idaho. Their language...tetracycline
(Encyclopedia)tetracycline tĕˌtrəsīˈklēn [key], any of a group of antibiotics produced by bacteria of the genus Streptomyces. Effective against a wide range of Gram positive and Gram negative bacteria, tetrac...Areopagus
(Encyclopedia)Areopagus ărēŏpˈəgəs [key] [Gr.,=hill of Ares], rocky hill, 370 ft (113 m) high, NW of the Acropolis of Athens, famous as the sacred meeting place of the prime council of Athens. This council, a...Gray, Asa
(Encyclopedia)Gray, Asa, 1810–88, one of America's leading botanists and taxonomists, b. Oneida co., N.Y. As professor of natural history at Harvard from 1842, he was the teacher of many eminent botanists. Throug...Browse by Subject
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