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Sieyès, Emmanuel Joseph

(Encyclopedia)Sieyès, Emmanuel Joseph ĕmänüĕlˈ zhôzĕfˈ syāĕsˈ [key], 1748–1836, French revolutionary and statesman. He was a clergyman before the Revolution and was known as Abbé Sieyès. His pamphle...

squash racquets

(Encyclopedia)squash racquets or squash, game played on a four-walled court, 16 ft (4.88 m) high by 181⁄2 ft (5.64 m) wide by 32 ft (9.75 m) long. The back wall, shorter than the front wall, usually measures 9 ft...

Petersburg

(Encyclopedia)Petersburg, city (1990 pop. 38,386), politically independent and in no county, SE Va., on the Appomattox River; inc. 1850. A port of entry and an important tobacco market, it has industries producing ...

transfinite number

(Encyclopedia)transfinite number, cardinal or ordinal number designating the magnitude (power) or order of an infinite set; the theory of transfinite numbers was introduced by Georg Cantor in 1874. The cardinal num...

differential geometry

(Encyclopedia)differential geometry, branch of geometry in which the concepts of the calculus are applied to curves, surfaces, and other geometric entities. The approach in classical differential geometry involves ...

node

(Encyclopedia)node, in astronomy, point at which the orbit of a body crosses a reference plane. One reference plane that is often used is the plane of the earth's orbit around the sun (ecliptic). Since the moon's o...

Madison, cities, United States

(Encyclopedia)Madison. 1 City (1990 pop. 12,006), seat of Jefferson co., SE Ind., on the Ohio River; settled c.1806, inc. 1838. It is a port of entry and a tobacco marketing center. Among its manufactures are trans...

Santa Fe, city, United States

(Encyclopedia)Santa Fe sănˈtə fā [key], city (1990 pop. 55,859), alt. c.7,000 ft (2,130 m), state capital and seat of Santa Fe co., N N.Mex., at the foot of the Sangre de Cristo Mts. It is an administrative, to...

Toledo , city, United States

(Encyclopedia)Toledo təlēˈdō [key], city (1990 pop. 332,943), seat of Lucas co., NW Ohio, on the Maumee River at its junction with Lake Erie; inc. 1837. With a natural harbor and its railroads and highways, Tol...

cladistics

(Encyclopedia)cladistics fīˌlōjənĕtˈĭk [key], an approach to the classification of living things in which organisms are defined and grouped by the possession of one or more shared characteristics (called cha...