Columbia Encyclopedia

(Encyclopedia) relapsing fever, infectious disease caused by a spirochete bacteria of the genus Borrelia and characterized by a high fever that breaks and then recurs a one to two weeks later. Relapsing fever may be...

(Encyclopedia) Serra, Richard, 1939–, American sculptor, b. San Francisco; grad. Univ. of California, Santa Barbara (B.A., 1961), Yale (B.F.A., M.F.A., 1974). Many of his early works (1960s) are cast in rubber or ...

(Encyclopedia) bull [Lat. bulla=leaden seal], papal letter. As the diplomatic organization of the papal chancery progressed in the Middle Ages, the papal bull came to be more solemn than the papal brief or encyclica...

(Encyclopedia) Guanajuato gwänähwäˈtō [key], state, 11,805 sq mi (30,575 sq km), W central Mexico, on the ...

(Encyclopedia) Farel, Guillaume gēyōmˈ färĕlˈ [key], 1489–1565, French religious reformer, associate of John Calvin. In 1520, Farel joined Jacques Lefèvre d'Étaples at Meaux to aid in church reform and to ...

(Encyclopedia) synthetic elements, in chemistry, radioactive elements that were not discovered occurring in nature but as artificially produced isotopes. They are technetium (at. no. 43), which was the first element...

(Encyclopedia) National Radio Astronomy Observatory (NRAO), federal observatory for radio astronomy, founded in 1956 and operated under contract with the National Science Foundation by Associated Universities, Inc.,...

(Encyclopedia) niobium nīōˈbēəm [key], metallic chemical element; symbol Nb; at. no. 41; at. wt. 92.90638; m.p. about 2,468℃; b.p. 4,742℃; sp. gr. 8.57 at 20℃; valence +2, +3, +4, or +5. Niobium is a rare...

(Encyclopedia) Ollivier, Émile āmēlˈ ôlēvyāˈ [key], 1825–1913, French statesman, a leading figure in the “Liberal Empire” of Napoleon III. Widely known as a brilliant lawyer, he was elected to the legi...

(Encyclopedia) Motlanthe, Kgalema Petrus kälāˈmä, mōtlänˈtā [key], 1949–, South African politician, b. Johannesburg. A fierce opponent of apartheid, he was influenced by Steve Biko and organized student pr...