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pi
(Encyclopedia)pi, in mathematics, the ratio of the circumference of a circle to its diameter. The symbol for pi is π. The ratio is the same for all circles and is approximately 3.1416. It is of great importance in...Prescott, William Hickling
(Encyclopedia)Prescott, William Hickling, 1796–1859, American historian, b. Salem, Mass. He entered his father's law office, but was compelled by a serious eye injury to abandon law. He received medical attention...Pamplona
(Encyclopedia)Pamplona pämplōˈnä [key], city (1990 pop. 183,525), capital of Navarre, N Spain, on the Arga River. An older spelling is Pampeluna. It is an important communications, agricultural, and industrial ...Aragón
(Encyclopedia)Aragón ârˈəgŏn, Span. ärägōnˈ [key], autonomous community, 18,425 sq mi (47,720 sq km), and former kingdom, NE Spain, bordered on the N by France. The city of Z...Moors
(Encyclopedia)Moors, nomadic people of the northern shores of Africa, originally the inhabitants of Mauretania. They were chiefly of Berber and Arab stock. In the 8th cent. the Moors were converted to Islam and bec...Orléans, French royal family
(Encyclopedia)Orléans ôrlāäNˈ [key], family name of two branches of the French royal line. The house of Valois-Orléans was founded by Louis, duc d'Orléans (see separate article), whose assassination (1407) c...Grey of Fallodon, Edward Grey, 1st Viscount
(Encyclopedia)Grey of Fallodon, Edward Grey, 1st Viscount fălˈədən [key], 1862–1933, British statesman. He entered Parliament as a Liberal in 1885 and became (1905) foreign secretary in the difficult period p...indium
(Encyclopedia)indium ĭnˈdēəm [key], a metallic chemical element; symbol In; at. no. 49; at. wt. 114.818; m.p. 156.6℃; b.p. about 2,080℃; sp. gr. 7.31 at 20℃; valence +1, +2, or +3. Indium is a soft, malle...Margaret of Austria
(Encyclopedia)Margaret of Austria, 1480–1530, Hapsburg princess, regent of the Netherlands; daughter of Emperor Maximilian I. She was betrothed (1483) to the dauphin of France, later King Charles VIII, and was tr...Charles I, emperor of Austria
(Encyclopedia)Charles I, 1887–1922, last emperor of Austria and, as Charles IV, king of Hungary (1916–18); son of Archduke Otto and grandnephew and successor of Emperor Francis Joseph. He married Zita of Bourbo...Browse by Subject
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