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Cherenkov radiation

(Encyclopedia)Cherenkov radiation or Cerenkov radiation [for P. A. Cherenkov], light emitted by a transparent medium when charged particles pass through it at a speed greater than the speed of light in the medium. ...

Derbent

(Encyclopedia)Derbent dyĭrbyĕntˈ [key], city, SE European Russia, in Dagestan, on the Caspian Sea. It st...

École des Beaux-Arts

(Encyclopedia)École des Beaux-Arts ākôlˈ dā bōzärˈ [key][Fr.,=school of fine arts], French national school of fine arts, on the Quai Malaquais, Paris, founded in 1648 by Charles Le Brun with the consent of ...

Tagus

(Encyclopedia)Tagus tāˈgəs [key], Span. Tajo, Port. Tejo, river, c.585 mi (940 km) long, rising in the mountains E of Madrid, E Spain, and draining the central part of the Iberian Peninsula. The Tagus flows nort...

phylloxera

(Encyclopedia)phylloxera fĭlŏkˈsĭrə [key], small, sap-eating, greenish insect of the genus Phylloxera, closely related to the aphid. Phylloxeras feed on leaves and roots, and many species produce galls on deci...

Bonneville, Benjamin Louis Eulalie de

(Encyclopedia)Bonneville, Benjamin Louis Eulalie de bŏnˈvĭl [key], 1796–1878, American army officer and trader who blazed portions of the Oregon Trail, b. France, grad. West Point, 1815. Acquainted with the fu...

mass spectrograph

(Encyclopedia)mass spectrograph, device used to separate electrically charged particles according to their masses; a form of the instrument known as a mass spectrometer is often used to measure the masses of isotop...

Sault Sainte Marie, city, United States

(Encyclopedia)Sault Sainte Marie, city (1990 pop. 14,689), seat of Chippewa co., N Mich., Upper Peninsula, a port of entry on the St. Marys River opposite Sault Ste Marie, Ont.; inc. as a city 1887. A variety of li...

Tian Shan

(Encyclopedia)Tian Shan or Tien Shan both: tēĕn shän [key] [Chin.,=celestial mountains], mountain system of central Asia, extending c.1,500 mi (2,410 km) from the Pamir Mts., Tajikistan, NE through the Xinjiang ...

Tone, Theobald Wolfe

(Encyclopedia)Tone, Theobald Wolfe, 1763–98, Irish revolutionary. He was called to the bar in 1789 but soon turned his attention to politics. Inspired by the example of the French Revolution, he helped found (179...