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hydrogen
(Encyclopedia)hydrogen hīˈdrəjən [key] [Gr.,=water forming], gaseous chemical element; symbol H; at. no. 1; interval in which at. wt. ranges 1.00784–1.00811; m.p. −259.14℃; b.p. −252.87℃; density 0.08...Paleolithic art
(Encyclopedia)Paleolithic art pāˌlēəlĭthˈĭk, –lēō–, pălˌ– [key], art produced during the Paleolithic period. Study and knowledge of this art largely have been confined to works discovered at many s...criticism
(Encyclopedia)criticism, the interpretation and evaluation of literature and the arts. It exists in a variety of literary forms: dialogues (Plato, John Dryden), verse (Horace, Alexander Pope), letters (John Keats),...abolitionists
(Encyclopedia)abolitionists, in U.S. history, particularly in the three decades before the Civil War, members of the movement that agitated for the compulsory emancipation of the slaves. Abolitionists are distingui...Boston, city, United States
(Encyclopedia)Boston, city (2020 pop. 692,600), state capital and seat of Suffolk co., E Mass., on Boston Bay, an arm of Massachusetts Bay; inc. 1822. The city includ...Celtic languages
(Encyclopedia)Celtic languages, subfamily of the Indo-European family of languages. At one time, during the Hellenistic period, Celtic speech extended all the way from Britain and the Iberian Peninsula in the west ...Ottoman Empire
(Encyclopedia) CE5 Ottoman Empire (c.1683) Ottoman Empire ŏtˈəmən [key], vast state founded in the late 13th cent. by Turkish tribes in Anatolia and ruled by the descendants of Osman I until its dissolution ...Bush, George Walker
(Encyclopedia)Bush, George Walker, 1946–, 43d President of the United States (2001–9), b. New Haven, Conn. The eldest son of President George H. W. Bush, he was was raised in Texas and, like his father, attende...Chicago, city, United States
(Encyclopedia)Chicago shĭkäˈgō, shĭkôˈgō [key], city (2020 pop. 2,746,388), seat of Cook co...New Orleans
(Encyclopedia)New Orleans ôrˈlēənz –lənz, ôrlēnzˈ [key], city (2006 pop. 187,525), coextensive with Orleans parish, SE La., between the Mississippi River and Lake Pontchartrain, 107 mi (172 km) by water f...Browse by Subject
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