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Maxentius

(Encyclopedia)Maxentius (Marcus Aurelius Valerius Maxentius) măksĕnˈshəs [key], d. 312, Roman emperor (306–12), son of Maximian. After Diocletian and Maximian had retired, the successor to Maximian, Constanti...

Ardashir I

(Encyclopedia)Ardashir I ärdäshērˈ [key] [another form of Artaxerxes], d. 240, king of Persia (226?–240). He overthrew the last Parthian king, Artabanus IV, entered Ctesiphon, and reunited Persia out of the c...

Pazzi conspiracy

(Encyclopedia)Pazzi conspiracy pätˈtsē [key], 1478, plot against Lorenzo de' Medici (Lorenzo il Magnifico) and his brother Giuliano, designed to end the hegemony of the Medici in the Florentine state and to enla...

Yang Kuei-fei

(Encyclopedia)Yang Kuei-fei yäng gwā-fā [key], 719–56, concubine of the T'ang emperor Hsüan-tsung. The most famous beauty in Chinese history, in legend she is said to have captivated the emperor who then negl...

Agrippina the Younger

(Encyclopedia)Agrippina the Younger, d. a.d. 59, Roman matron; daughter of Germanicus Caesar and Agrippina the Elder. By her first husband, Cneius Domitius Ahenobarbus, she was the mother of Nero. After her brother...

Aetolian League

(Encyclopedia)Aetolian League, confederation centering in the cities of Aetolia. It was formed in the 4th cent. b.c. and began to gain power in the 3d cent. in opposing the Achaean League and the Macedonians. At it...

Adolf of Nassau

(Encyclopedia)Adolf of Nassau näˈsou [key], d. 1298, duke of Luxembourg, German king (1292–98). He owed his election to the ecclesiastical electors, who, fearing the growing power and ambition of the Hapsburgs,...

Three Mile Island

(Encyclopedia)Three Mile Island, site of a nuclear power plant 10 mi (16 km) south of Harrisburg, Pa. On Mar. 28, 1979, failure of the cooling system of the No. 2 nuclear reactor led to overheating and partial melt...

Sorel, Georges

(Encyclopedia)Sorel, Georges sôrĕlˈ [key], 1847–1922, French social philosopher. An engineer before he devoted himself to writing, Sorel found in the political and social life of bourgeois democracy the trium...

resistor

(Encyclopedia)resistor, two-terminal electric circuit component that offers opposition to an electric current. Resistors are normally designed and operated so that, with varying levels of current, variations of the...