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Cooper, Peter

(Encyclopedia)Cooper, Peter, 1791–1883, American inventor, industrialist, and philanthropist, b. New York City. After achieving success in the glue business, Cooper, with two partners, erected (1829) the Canton I...

oratory

(Encyclopedia)oratory, the art of swaying an audience by eloquent speech. In ancient Greece and Rome oratory was included under the term rhetoric, which meant the art of composing as well as delivering a speech. Or...

larkspur, in botany

(Encyclopedia)larkspur, any north temperate, Old World annual of the genus Consolida of the buttercup family. Consolida species were formerly classified in the genus Delphinium, which includes similar annual, bienn...

thrush , in zoology

(Encyclopedia)thrush, bird, common name for members of the Turdidae, a large family of birds found in most parts of the world and noted for their beautiful song. The majority are modestly colored, with spotted unde...

boulder, in geology

(Encyclopedia)boulder, large rock fragment formed by detachment from its parent consolidated rock by weathering and erosion. In engineering and geology, especially in the United States, the term is applied to loose...

wave, in physics

(Encyclopedia)wave, in physics, the transfer of energy by the regular vibration, or oscillatory motion, either of some material medium or by the variation in magnitude of the field vectors of an electromagnetic fie...

Foster, Stephen Collins

(Encyclopedia)Foster, Stephen Collins, 1826–64, American songwriter and composer, b. Lawrenceville, Pa. His pioneer family was aware of his talent for music, but not understanding it they provided him with little...

Ford, John, American film director

(Encyclopedia)Ford, John, 1895–1973, American film director, b. Cape Elizabeth, Maine, as John Martin Feeney. Ford began directing in 1917 after an apprenticeship with his brother Francis. Over the next 50 years,...

AIDS, in medicine

(Encyclopedia)AIDS or acquired immunodeficiency syndrome, fatal disease caused by a rapidly mutating retrovirus that attacks the immune system and leaves the victim vulnerable to infections, malignancies, and neuro...

liberty, in political science

(Encyclopedia)liberty, term used to describe various types of individual freedom, such as religious liberty, political liberty, freedom of speech, right of self-defense, and others. It is also used as a general ter...