Columbia Encyclopedia

Search results

458 results found

fortification

(Encyclopedia)fortification, system of defense structures for protection from enemy attacks. Fortification developed along two general lines: permanent sites built in peacetime, and emplacements and obstacles hasti...

West Bank

(Encyclopedia)West Bank, territory, formerly part of Palestine, after 1949 administered by Jordan, since 1967 largely occupied by Israel (2005 est. pop. 2,386,000), 2,165 sq mi (5,607 sq km), west of the Jordan Riv...

carbon

(Encyclopedia)CE5 The three solid forms of pure carbon: In the diamond crystal each carbon atom is surrounded symmetrically by four other carbons (at each of the four corners of a tetrahedron). In the graphite c...

Mali

(Encyclopedia)CE5 Mali mäˈlē [key], officially Republic of Mali, independent republic (2015 est. pop. 17,468,000), 478,764 sq mi (1,240,000 sq km), the largest country in W Africa. Mali is bordered on the nor...

Kennedy, John Fitzgerald

(Encyclopedia)Kennedy, John Fitzgerald, 1917–63, 35th President of the United States (1961–63), b. Brookline, Mass.; son of Joseph P. Kennedy. On Nov. 22, 1963, President Kennedy was shot and killed while ...

Bahamas, the

(Encyclopedia)CE5 Bahamas, the bəhäˈməz [key], officially Commonwealth of the Bahamas, independent nation (2020 ...

Russell, Bertrand Arthur William Russell, 3d Earl

(Encyclopedia)Russell, Bertrand Arthur William Russell, 3d Earl, 1872–1970, British philosopher, mathematician, and social reformer, b. Trelleck, Wales. As with his philosophical stance, Russell's positions on ...

Pan-Americanism

(Encyclopedia)Pan-Americanism, movement toward commercial, social, economic, military, and political cooperation among the nations of North, Central, and South America. In the early 20th cent., U.S. manipulation ...

isomer

(Encyclopedia)isomer īˈsəmər [key], in chemistry, one of two or more compounds having the same molecular formula but different structures (arrangements of atoms in the molecule). Isomerism is the occurrence of ...

Gaza Strip

(Encyclopedia)Gaza Strip gäzˈə [key], rectangular coastal area, c.140 sq mi (370 sq km), SW Asia, on the ...