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Poisson, Siméon Denis

(Encyclopedia) Poisson, Siméon DenisPoisson, Siméon DenissēmāôNˈ dənēˈ pwäsôNˈ [key], 1781–1840, French mathematician and physicist. From 1802 he taught at the École polytechnique, Paris, and was…

Legendre, Adrien Marie

(Encyclopedia) Legendre, Adrien MarieLegendre, Adrien MarieädrēăNˈ märēˈ ləzhäNˈdrə [key], 1752–1833, French mathematician. He is noted especially for his work on the theory of numbers, on which he…

avalanche

(Encyclopedia) avalanche, rapidly descending large mass of snow, ice, soil, rock, or mixtures of these materials, sliding or falling in response to the force of gravity. Avalanches, which are natural…

multinational corporation

(Encyclopedia) multinational corporation, business enterprise with manufacturing, sales, or service subsidiaries in one or more foreign countries, also known as a transnational or international…

Mudéjar

(Encyclopedia) MudéjarMudéjarm&oomacr;ᵺāˈhär [key], name given to the Moors who remained in Spain after the Christian reconquest but were not converted to Christianity, and to the style of…

Mongan, Marie

(Encyclopedia) Mongan, Marie, 1933-2019, American natural childbirth advocate, b. San Diego, Ca., as Marie Madeline Flanagan, Plymouth State Univ. (B…

Cormack, Allan MacLeod

(Encyclopedia) Cormack, Allan MacLeodCormack, Allan MacLeodməkloudˈ, côrˈmək [key], 1924–98, American physicist, b. Johannesburg, South Africa. After studying at the Univ. of Cape Town (B.S. physics…

Duceppe, Gilles

(Encyclopedia) Duceppe, GillesDuceppe, Gilleszhēl düsĕpˈ [key], 1947–, French-Canadian separatist politician, b. Montreal. A union negotiator from 1977 to 1990 and a Quebec separtatist from 1967,…

Fitch, Val Logsdon

(Encyclopedia) Fitch, Val Logsdon, 1923–2015, American nuclear physicist, b. Merriman, Neb., Ph.D. Columbia, 1954. During World War II Fitch was drafted into the army and worked on the detonator for…

Birkeland, Kristian

(Encyclopedia) Birkeland, Kristian or Olaf ChristianBirkeland, Kristian or Olaf Christiankrĭsˈtyän bērˈkəlän, ōˈläv [key], 1867–1917, Norwegian physicist. From 1898 Birkeland was a professor at the…