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projective geometry

(Encyclopedia)projective geometry, branch of geometry concerned with those properties of geometric figures that remain invariant under projection. The basic elements are points, lines, and planes, and the following...

Plymouth, city, England

(Encyclopedia)Plymouth, city and unitary authority (1991 pop. 238,583), SW England, on Plymouth Sound. The three towns that Plymouth has comprised since 1914 are Plymouth, Stonehouse, and Devonport; the suburbs of ...

Maryville

(Encyclopedia)Maryville, city (1990 pop. 19,208), seat of Blount co., E Tenn.; settled around Fort Craig (built 1785), inc. as a town 1830, as a city 1927. With its twin city, Alcoa, it is an important center for t...

Ryan, Nolan

(Encyclopedia)Ryan, Nolan (Lynn Nolan Ryan, Jr.), 1947–, American baseball player, b. Refugio, Tex. A right-handed pitcher with a blazing fastball, he played with the New York Mets, the California Angels, the Hou...

stadium

(Encyclopedia)stadium stāˈdēəm [key], racecourse in Greek cities where footraces and other athletic contests took place. The name is the Latin form of the Greek word for a standard of length and originally refe...

Barkley, Charles Wade

(Encyclopedia)Barkley, Charles Wade 1963–, American basketball player, b. Leeds, Ala. After starring at Auburn Univ., he joined the Philadelphia 76ers of the National Basketball Association (NBA) in 1984. Shorter...

acupuncture

(Encyclopedia)CE5 Acupuncture points for treating diseases of the large intestine. acupuncture ăkˈyo͝opŭngˌchər [key], technique of traditional Chinese medicine, in which a number of very fine metal needl...

Saint-Denis, city, France

(Encyclopedia)Saint-Denis săN-dənēˈ [key], city (1990 pop. 90,806), Seine–Saint-Denis dept., N central France. It is an industrial suburb N of Paris. Metals, chemicals, machinery, electronics, and food produc...

Lewis, Carl

(Encyclopedia)Lewis, Carl (Frederick Carlton Lewis), 1961–, American sprinter and jumper, b. Birmingham, Ala. A star in high school and at the Univ. of Houston, he became possibly the greatest track athlete of al...

Rusk, Thomas Jefferson

(Encyclopedia)Rusk, Thomas Jefferson, 1803–57, American political leader, U.S. Senator from Texas (1846–57), b. Pendleton District, S.C. He studied law under John C. Calhoun and practiced in Clarksville, Ga., f...