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bongo

(Encyclopedia)bongo bŏngˈgō [key], spiral-horned antelope, Tragelaphus eurycerus, found in jungles and thick bamboo forests of equatorial Africa. Shy, elusive animals, bongos never emerge into the open and are s...

vector

(Encyclopedia)vector, quantity having both magnitude and direction; it may be represented by a directed line segment. Many physical quantities are vectors, e.g., force, velocity, and momentum. Thus, in specifying a...

Du Chaillu, Paul Belloni

(Encyclopedia)Du Chaillu, Paul Belloni pōl bĕlōnēˈ dü shāyüˈ [key], c.1831–1903, French-American explorer in Africa. Born probably in Paris, he spent his youth on the west coast of Africa, where his fath...

Roraima

(Encyclopedia)Roraima ro͝orīˈmə [key], state (1996 pop. 247,724), 88,843 sq mi (230,103 sq km), NW Brazil, on the border of Venezuela and Guyana. Boa Vista is the capital. Located almost entirely in the Guiana ...

Harvard University

(Encyclopedia)Harvard University, mainly at Cambridge, Mass., including Harvard College, the oldest American college. From two distinct schools, Radcliffe College for women (est. 1879, chartered 1894) and Harvar...

Organization of Petroleum Exporting Countries

(Encyclopedia)Organization of Petroleum Exporting Countries (OPEC), multinational organization (est. 1960, formally constituted 1961) that coordinates petroleum policies and economic aid among oil-producing nations...

numeration

(Encyclopedia)numeration, in mathematics, process of designating numbers according to any particular system; the number designations are in turn called numerals. In any place value system of numeration, a base numb...

Fermat, Pierre de

(Encyclopedia)Fermat, Pierre de pyĕr də fĕrmäˈ [key], 1601–65, French mathematician. A magistrate whose avocation was mathematics, Fermat is known as a founder of modern number theory and probability theory....

stuttering

(Encyclopedia)stuttering or stammering, speech disorder marked by hesitation and inability to enunciate consonants without spasmodic repetition. Known technically as dysphemia, it has sometimes been attributed to a...

ring, in astronomy

(Encyclopedia)ring, in astronomy, relatively thin band of rocks and dust and ice particles that orbit around a planet in the planet's equatorial plane. All four of the giant planets in the solar system—Jupiter, S...