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Rambouillet, Catherine de Vivonne, marquise de

(Encyclopedia)Rambouillet, Catherine de Vivonne, marquise de kätrēnˈ də vēvônˈ märkēzˈ də räNbo͞oyāˈ [key], 1588–1665, famous Frenchwoman, whose salon exercised a profound influence on French liter...

Tordesillas, Treaty of

(Encyclopedia)Tordesillas, Treaty of tōrˌᵺāsēˈlyäs [key], 1494, agreement signed at Tordesillas, Spain, by which Spain and Portugal divided the non-Christian world into two zones of influence. In principle ...

Europa Island

(Encyclopedia)Europa Island yo͝orōˈpə [key], volcanic island, c.11 sq mi (28 sq km), between Madagascar and Mozambique in the Mozambique Channel, W Indian Ocean, part of the Scattered Islands district in the Fr...

Tromelin Island

(Encyclopedia)Tromelin Island trōmlăNˈ [key], c.1 sq mi (2.6 sq km), in the Indian Ocean c.260 mi (420 km) E of Madagascar, part of the Scattered Islands district with the French Southern and Antarctic Lands. A ...

Byrd, Richard Evelyn

(Encyclopedia)Byrd, Richard Evelyn, 1888–1957, American aviator and polar explorer, b. Winchester, Va. He took up aviation in 1917, and after World War I he gained great fame in the air. He commanded the naval ai...

calculus of variations

(Encyclopedia)calculus of variations, branch of mathematics concerned with finding maximum or minimum conditions for a relationship between two or more variables that depends not only on the variables themselves, a...

Order of American Knights

(Encyclopedia)Order of American Knights: see Knights of the Golden Circle. ...

logical positivism

(Encyclopedia)logical positivism, also known as logical or scientific empiricism, modern school of philosophy that attempted to introduce the methodology and precision of mathematics and the natural sciences into t...

Androuet du Cerceau

(Encyclopedia)Androuet du Cerceau äNdro͞o-āˈ dü sĕrsōˈ [key], family of French architects active in the 16th and 17th cent. It was founded by Jacques Androuet, c.1520–c.1584, surnamed du Cerceau [Fr.,=cir...

icebreaker

(Encyclopedia)icebreaker, ship of special hull design and wide beam, with relatively flat bottom, designed to force its way through ice. When the icebreaker charges into the ice at full speed, its sharply inclined ...