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superphosphate
(Encyclopedia)superphosphate or superphosphate of lime, Ca(H2PO4)2, is a compound produced by treating rock phosphate with sulfuric acid or phosphoric acid, or a mixture of the two. It is the principal carrier of p...cuesta
(Encyclopedia)cuesta kwĕsˈtə [key], asymmetric ridge characterized by a short, steep escarpment on one side, and a long, gentle slope on the other. The steep side exposes the edge of erosion-resistant rock layer...Brown v. Board of Education of Topeka, Kans.
(Encyclopedia)Brown v. Board of Education of Topeka, Kans., case decided by the U.S. Supreme Court in 1954. Linda Brown was denied admission to her local elementary school in Topeka because she was black. When, com...Inowrocław
(Encyclopedia)Inowrocław ēnôvrôtsˈläf [key], Ger. Hohensalza, city (1993 est. pop. 78,800), Kujawsko-Pomorskie prov., N central Poland. It is an important railway and industrial center where chemicals and bri...Arnhem Land
(Encyclopedia)Arnhem Land, 37,100 sq mi (96,089 sq km), N Northern Territory, Australia, on a wide peninsula W of the Gulf of Carpentaria. The great majority of the region belongs to the Arnhem Land Aboriginal Rese...Dixon
(Encyclopedia)Dixon, city (2020 pop. 15,274), seat of Lee co., N Ill., on the Rock River; founded 1830, inc. 1857. Corn and soybeans are grown, cattle are raised, and...Tarpeia
(Encyclopedia)Tarpeia tärpēˈyə [key], in Roman legend, a Roman woman who betrayed her city to the Sabines for what they wore on their left arms (their gold bracelets). As they entered Rome they crushed her unde...Zab
(Encyclopedia)Zab zäb, zăb [key], name applied to the two principal tributaries of the Tigris River. The Great Zab, 265 mi (426 km) long, rises in SE Turkey and flows generally S through Iraq to the Tigris. The L...Williamsport
(Encyclopedia)Williamsport, city (1990 pop. 31,933), seat of Lycoming co., central Pa., on the Susquehanna River; settled 1772, inc. as a borough 1806, as a city 1866. Williamsport grew with the development of the ...petroleum
(Encyclopedia)petroleum, oily, flammable liquid that occurs naturally in deposits, usually beneath the surface of the earth; it is also called crude oil. It consists principally of a mixture of hydrocarbons, with t...Browse by Subject
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