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pen

(Encyclopedia)pen, pointed implement used in writing or drawing to apply ink or a similar colored fluid to any surface, such as paper. Various kinds of pens have been used since ancient times. Reeds that were slit ...

Le Châtelier's principle

(Encyclopedia)Le Châtelier's principle, chemical principle that states that if a system in equilibrium is disturbed by changes in determining factors, such as temperature, pressure, and concentration of components...

Carleton, Guy, 1st Baron Dorchester

(Encyclopedia)Carleton, Guy, 1st Baron Dorchester, 1724–1808, governor of Quebec and British commander during the American Revolution. He began his service in America in 1758 and distinguished himself in the Fren...

bowling

(Encyclopedia)bowling, indoor sport, also called tenpins, played by rolling a ball down an alley at ten pins; for lawn bowling, see bowls. Bowling is one of the most popular participatory sports in the United State...

Niagara Falls, waterfall, United States and Canada

(Encyclopedia)Niagara Falls, in the Niagara River, W N.Y. and S Ont., Canada; one of the most famous spectacles in North America. The falls are on the international line between the cities of Niagara Falls, N.Y., a...

Mercury, in astronomy

(Encyclopedia)Mercury, in astronomy, nearest planet to the sun, at a mean distance of 36 million mi (58 million km); its period of revolution is 88 days. Mercury passes through phases similar to those of the moon a...

non-Euclidean geometry

(Encyclopedia)non-Euclidean geometry, branch of geometry in which the fifth postulate of Euclidean geometry, which allows one and only one line parallel to a given line through a given external point, is replaced b...

Illampú

(Encyclopedia)Illampú ēyämpo͞oˈ [key], peak, 21,276 ft (6,485 m) high, in the Cordillera Real of the Bolivian Andes, E Bolivia. Although lower than the adjacent peak, Ancohuma (21,489 ft/6,550 m high), Illamp�...

Kwekwe

(Encyclopedia)Kwekwe, formerly Que Que both: kwāˈkwāˈ [key], city (1992 pop. 75,425), central Zimbabwe, founded 1900. It is a gold-mining center and the focal point of Zimbabwe's iron and steel industry. ...

Leamington, town, Canada

(Encyclopedia)Leamington lēˈmĭngtən, lĕmˈ– [key], town (1991 pop. 14,182), S Ont., Canada, on Lake Erie. A market-gardening area located in one of Canada's warmer regions, it also is the gateway to Point Pe...