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Organization of African Unity

(Encyclopedia)Organization of African Unity (OAU), former international organization, established 1963 at Addis Ababa, Ethiopia, by 37 independent African nations to promote unity and development; defend the sovere...

brass

(Encyclopedia)brass, alloy having copper (55%–90%) and zinc (10%–45%) as its essential components. The properties of brass vary with the proportion of copper and zinc and with the addition of small amounts of o...

Souphanouvong, Prince

(Encyclopedia)Souphanouvong, Prince so͞ofäˈno͞ovŏngˌ [key], 1909–95, Laotian government official; half-brother of Prince Souvanna Phouma. Although a member of Laos's royal family, he was an active nationali...

Bath, city, England

(Encyclopedia)Bath, city (2021 pop. 88,859), Bath and North East Somerset, SW England, in the Avon River valley. Britain's leading winter resort, Bath has the only na...

sulfide

(Encyclopedia)sulfide, chemical compound containing sulfur and one other element or sulfur and a radical. Sulfides may be salts or esters of hydrogen sulfide, H2S, or may be formed directly, e.g., by heating a meta...

Bayle, Pierre

(Encyclopedia)Bayle, Pierre pyĕr bāl [key], 1647–1706, French philosopher. Born a Huguenot, he converted to Roman Catholicism and then returned to Protestantism. To avoid French intolerance of Protestants, he m...

Young Men's Christian Association

(Encyclopedia)Young Men's Christian Association, (the Y or YMCA), organization having as its objective the development of values and behaviors that are consistent with Christian principles. Despite its name, member...

Yung-lo

(Encyclopedia)Yung-lo yo͞ong-lô [key], 1359–1424, reign title of the 3d emperor (1403–24) of the Chinese Ming dynasty, whose personal name was Chu Ti. He rose to power in N China after being delegated by his ...

radioactivity

(Encyclopedia)CE5 Effects of a magnetic field on the products of radioactivity CE5 Disintegration series: Radioactive decay of radium-226 into lead-206 radioactivity, spontaneous disintegration or decay of t...

Leadville

(Encyclopedia)Leadville lĕdˈvĭl [key], mining city (1990 pop. 2,629), alt. c.10,200 ft (3,110 m), seat of Lake co., central Colo., near the headwaters of the Arkansas River, in the Rocky Mts.; inc. 1878. Some mi...