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Laplace, Pierre Simon, marquis de

(Encyclopedia)Laplace, Pierre Simon, marquis de pyĕr sēmôNˈ märkēˈ də läpläsˈ [key], 1749–1827, French astronomer and mathematician. At 18 he went to Paris, proved his gift for mathematical analysis to...

Samuelson, Paul Anthony

(Encyclopedia)Samuelson, Paul Anthony, 1915–2009, American economist, b. Gary, Ind., grad. Univ. of Chicago (B.A., 1935), Harvard (M.A., 1936; Ph.D., 1941). Appointed a professor of economics at the Massachusetts...

tektite

(Encyclopedia)tektite tĕktīt [key], naturally occurring, silica-rich (65%–80% SiO2) glass resembling obsidian and sometimes shale, and is normally jet black to olive green. They appear as small rounded or elong...

chiropractic

(Encyclopedia)chiropractic kīrəprăkˈtĭk [key] [Gr.,=doing by hand], medical practice based on the theory that all disease results from a disruption of the functions of the nerves. The principal source of inter...

Gautier, Théophile

(Encyclopedia)Gautier, Théophile gōtyāˈ [key], 1811–72, French poet, novelist, and critic. He was a leading exponent of “art for art's sake”—the belief that formal, aesthetic beauty is the sole purpose...

Gould, Stephen Jay

(Encyclopedia)Gould, Stephen Jay, 1941–2002, American paleontologist and science writer, b. Queens, New York; grad. Antioch College (B.S., 1963), Columbia Univ. (Ph.D., 1967). With Niles Eldredge, Gould proposed ...

triangle , in mathematics

(Encyclopedia)triangle, in mathematics, plane figure bounded by three straight lines, the sides, which intersect at three points called the vertices. Any one of the sides may be considered the base of the triangle....

Quine, W. V.

(Encyclopedia)Quine, W. V. (Willard Van Orman Quine) kwīn [key], 1908–2000, American philosopher and mathematical logician, b. Akron, Ohio, grad. Oberlin, 1930. He studied at Harvard (Ph.D., 1932) under Alfred N...

Pasteur, Louis

(Encyclopedia)Pasteur, Louis păstŭrˈ, Fr. lwē pästörˈ [key], 1822–95, French chemist. He taught at Dijon, Strasbourg, and Lille, and in Paris at the École normale supérieure and the Sorbonne (1867–89)....

hooks, bell

(Encyclopedia)hooks, bell, 1952–2021, American author, poet, social critic, and Black feminist, b. Hopkinsville, Ky., as Gloria Jean Watkins, Stanford Univ. (B.A., ...