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floodplain
(Encyclopedia) floodplain, level land along the course of a river formed by the deposition of sediment during periodic floods. Floodplains contain such features as levees, backswamps, delta plains,…Vatnajökull
(Encyclopedia) VatnajökullVatnajökullvätˈnäyöˈk&oobreve;l [key], glacier, c.3,150 sq mi (8,160 sq km), SE Iceland; largest glacier in Europe. At an elevation of from 4,200 to 6,100 ft (1,280–1,…bloodletting
(Encyclopedia) bloodletting, also called bleeding, practice of drawing blood from the body in the treatment of disease. General bloodletting consists of the abstraction of blood by incision into an…technetium
(Encyclopedia) technetiumtechnetiumtĕknēˈshēəm [key] [Gr. technetos=artificial], artificially produced radioactive chemical element; symbol Tc; at. no. 43; mass no. of most stable isotope 98; m.p. 2,…Wyszynski, Stefan
(Encyclopedia) Wyszynski, StefanWyszynski, Stefanstĕˈfän vĭzĭnˈskē [key], 1901–81, Polish prelate, cardinal of the Roman Catholic Church. Ordained in 1924, he received (1929) a doctorate in sociology…Semey
(Encyclopedia) SemeySemeysĕmˈā [key] or SemipalatinskSemeysyĭmēˌpəläˈtyĭnsk [key], city (1993 est. pop. 342,000), capital of Semey region, NE Kazakhstan, on the Irtysh River and the Turkistan-Siberia…alkali metals
(Encyclopedia) alkali metals, metals found in Group 1 of the periodic table. Compared to other metals they are soft and have low melting points and densities. Alkali metals are powerful reducing…alkaline-earth metals
(Encyclopedia) alkaline-earth metals, metals constituting Group 2 of the periodic table. Generally, they are softer than most other metals, react readily with water (especially when heated), and are…Fens, the
(Encyclopedia) Fens, the, district, E England, a flat lowland, W and S of The Wash. Extending c.70 mi (110 km) from north to south and c.35 mi (60 km) from east to west, it is traversed by numerous…francium
(Encyclopedia) franciumfranciumfrănˈsēəm [key] [from France], radioactive chemical element; symbol Fr; at. no. 87; mass no. of most stable isotope 223; m.p. about 27℃ (estimated); b.p. 677℃ (…Trending
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