(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…
(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…
(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…
(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…
(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…
(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…
(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…
(Encyclopedia) Chandrasekhar, SubrahmanyanChandrasekhar, Subrahmanyans&oobreve;bˌrəmänˈyən chŭnˌdrəsāˈkər [key], 1910–95, American astrophysicist, b. Lahore, India (now Pakistan). He became a…
(Encyclopedia) artificial life support, systems that use medical technology to aid, support, or replace a vital function of the body that has been seriously damaged. Such techniques include…
(Encyclopedia) BabenbergBabenbergbäˈbənbĕrk [key], ruling house of Austria (976–1246). It possibly descended from, or succeeded, a powerful Franconian family of the 9th cent. from whose castle the…
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