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tournament

(Encyclopedia)tournament or tourney, in the Middle Ages, public contest between armed horsemen in simulation of real battle. In this military game, which flourished from the 12th to the 16th cent., combatants were ...

energy, sources of

(Encyclopedia)energy, sources of, origins of the power used for transportation, for heat and light in dwelling and working areas, and for the manufacture of goods of all kinds, among other applications. The develop...

Teller, Edward

(Encyclopedia)Teller, Edward, 1908–2003, American physicist, b. Budapest, Hungary, Ph.D. Univ. of Leipzig, 1930, where he studied under Werner Heisenberg. Fleeing the Nazis, he came to the United States in 1935 a...

Jülich, town, Germany

(Encyclopedia)Jülich, town (1994 pop. 31,780), North Rhine–Westphalia, W Germany. It has some light industry and is the seat of a nuclear research center. Originally a Roman settlement known as Juliacum, Jülich...

Castro, Fidel

(Encyclopedia)Castro, Fidel (Fidel Alejandro Castro Ruz) käsˈtrō [key], 1926–2016, Cuban revolutionary, premier of Cuba (1959–76), president of the Council of State and of the Council of Ministers (1976–2...

magnetic resonance

(Encyclopedia)magnetic resonance, in physics and chemistry, phenomenon produced by simultaneously applying a steady magnetic field and electromagnetic radiation (usually radio waves) to a sample of atoms and then a...

Livermore

(Encyclopedia)Livermore, city (1990 pop. 56,741), Alameda co., W central Calif.; inc. 1876. Nursery stock is grown, and there is light manufacturing, but the major sources of employment are wineries and the Lawrenc...

Ogden, city, United States

(Encyclopedia)Ogden, city (1990 pop. 63,909), seat of Weber co., N Utah, at the confluence of the Ogden and Weber rivers; inc. 1851. Aerospace industries and Hill Air Force Base are the major employers. There is we...

Philoctetes

(Encyclopedia)Philoctetes fĭlŏktēˈtēz [key], in Greek mythology, son of Poias. He acquired, by gift, the bow and arrow of Hercules by lighting the pyre on which the hero was consumed alive. On his way to the T...

castor bean

(Encyclopedia)castor bean, bean produced by Ricinus communis, a plant of the spurge family, widely cultivated as an ornamental. Moles die when they eat the roots. It has long been used as an ordeal poison in parts ...