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Boolean algebra

(Encyclopedia)Boolean algebra bo͞oˈlēən [key], an abstract mathematical system primarily used in computer science and in expressing the relationships between sets (groups of objects or concepts). The notational...

Biddle, Nicholas, American financier

(Encyclopedia)Biddle, Nicholas, 1786–1844, American financier, b. Philadelphia. After holding important posts in the American legations in France and England, he returned to the United States in 1807 and became o...

Oromo

(Encyclopedia)Oromo gălˈə [key], traditionally pastoral tribes who live in W and S Ethiopia and N Kenya. They number more than 25 million. About half are Muslim, about a third Ethiopian Orthodox, and about a six...

Brandeis, Louis Dembitz

(Encyclopedia)Brandeis, Louis Dembitz brănˈdīs [key], 1856–1941, associate justice of the U.S. Supreme Court (1916–39), b. Louisville, Ky., grad. Harvard law school, 1877. As a successful Boston lawyer (1879...

abolitionists

(Encyclopedia)abolitionists, in U.S. history, particularly in the three decades before the Civil War, members of the movement that agitated for the compulsory emancipation of the slaves. Abolitionists are distingui...

Chautauqua movement

(Encyclopedia)Chautauqua movement, development in adult education somewhat similar to the lyceum movement. It derived from an institution at Chautauqua, N.Y. There, in 1873, John Heyl Vincent and Lewis Miller propo...

gold rush

(Encyclopedia)gold rush, influx of prospectors, merchants, adventurers, and others to newly discovered gold fields. One of the most famous of these stampedes in pursuit of riches was the California gold rush. The d...

Lin, Maya Ying

(Encyclopedia)Lin, Maya Ying mīˈə [key], 1959–, American architect and sculptor, b. Athens, Ohio. Lin's work is known for its visual poetry and sensitive mingling of highly abstract form with meaning. From an ...

matriarchy

(Encyclopedia)matriarchy, familial and political rule by women. Many contemporary anthropologists reject the claims of J. J. Bachofen and Lewis Morgan that early societies were matriarchal, although some contempora...

parody

(Encyclopedia)parody, mocking imitation in verse or prose of a literary work. The following poem by Robert Southey was parodied by Lewis Carroll: “You are old, Father William,” the young man cried; “The few l...