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Mamun, al-

(Encyclopedia)Mamun, al- (Abu al-Abbas Abd Allah al-Mamun) mämo͞onˈ [key], 786–833, 7th Abbasid caliph (813–33); son of Harun ar-Rashid. He succeeded his brother al-Amin after a bitter civil war, but was una...

Arequipa

(Encyclopedia)Arequipa ärākēˈpä [key], city (2020 pop. 923,000), alt. c.7,550 ft (2,300 m), capital of Arequipa dept., S Peru, on the Chili River. One of Peru's largest cities, it ...

mass number

(Encyclopedia)mass number, often represented by the symbol A, the total number of nucleons (neutrons and protons) in the nucleus of an atom. All atoms of a chemical element have the same atomic number (number of pr...

Rogge, Jacques

(Encyclopedia)Rogge, Jacques zhäk rōˈkhə [key], 1942–, Belgian sports executive, b. Ghent. An orthopedic surgeon with a degree in sports medicine, Rogge is an accomplished sailor who competed in Olympic yacht...

Scrope, Richard Le

(Encyclopedia)Scrope, Richard Le lə skro͞op [key], 1350?–1405, English archbishop. He probably studied law at both Oxford and Cambridge. Having taken priest's orders in 1377, he rose steadily in church rank. In...

Tarbes

(Encyclopedia)Tarbes tärb [key], city (1990 pop. 50,228), capital of Hautes-Pyrénées dept., SW France, on the Adour River. It is an industrial, commercial, and tourist center in a cattle- and horse-raising area....

Clay, Cassius Marcellus

(Encyclopedia)Clay, Cassius Marcellus, 1810–1903, American politician and diplomat, b. Madison co., Ky. Although he came from a slaveholding family, Clay early came to abhor the institution of slavery. In 1845 he...

Giurgiu

(Encyclopedia)Giurgiu jo͝orˈjo͝o [key], city, S Romania, in Walachia, on the Danube River opposite R...

Davis, Stuart

(Encyclopedia)Davis, Stuart, 1894–1964, American painter, b. Philadelphia, studied with Robert Henri in New York City. At the age of 19 he did drawings and covers for The Masses and exhibited in the Armory Show. ...

Depew, Chauncey Mitchell

(Encyclopedia)Depew, Chauncey Mitchell dĭpyo͞oˈ [key], 1834–1928, American orator, politician, and railroad president, b. Peekskill, N.Y. Admitted to the bar in 1856, he was a Republican member (1862–63) of ...