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algebra
(Encyclopedia) algebra, branch of mathematics concerned with operations on sets of numbers or other elements that are often represented by symbols. Algebra is a generalization of arithmetic and gains…Rousseau, Jean Jacques
(Encyclopedia) Rousseau, Jean JacquesRousseau, Jean JacqueszhäN zhäk [key]Rousseau, Jean Jacques r&oomacr;sōˈ [key], 1712–78, Swiss-French philosopher, author, political theorist, and composer…tenure, in law
(Encyclopedia) tenure, in law, manner in which property in land is held. The nature of tenure has long been of great importance, both in law and in the broader economic and political context. Tenure…Tay-Sachs disease
(Encyclopedia) Tay-Sachs diseaseTay-Sachs diseasetāˈ-săksˈ [key], rare hereditary disease caused by a genetic mutation that leaves the body unable to produce an enzyme necessary for fat metabolism in…Nassau, former duchy, Germany
(Encyclopedia) NassauNassaunäˈsou [key], former duchy, W central Germany, situated N and E of the Main and Rhine rivers. It is now mostly included in the state of Hesse, and partly in the state of…Gettysburg Address
(Encyclopedia) Gettysburg Address, speech delivered by Abraham Lincoln on Nov. 19, 1863, at the dedication of the national cemetery on the Civil War battlefield of Gettysburg, Pa. It is one of the…war
(Encyclopedia) war, armed conflict between states or nations (international war) or between factions within a state (civil war), prosecuted by force and having the purpose of compelling the defeated…safety lamp
(Encyclopedia) safety lamp, oil lamp designed for safe use in mines and other places where flammable gases such as firedamp (see damp) may be present. Its invention (c.1816) is usually attributed to…Spectator
(Encyclopedia) Spectator, English daily periodical published jointly by Joseph Addison and Richard Steele with occasional contributions from other writers. It succeeded the Tatler, a periodical begun…Sancho III, king of Navarre
(Encyclopedia) Sancho III or Sancho the GreatSancho the Greatsänˈchō [key], c.970–1035, king of Navarre (1000–1035). Having inherited the kingdom of Navarre, which included Aragón, he launched an…Trending
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