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Pelotas

(Encyclopedia)Pelotas pəlôˈtəsh [key], city (1991 pop. 291,100), Rio Grande do Sul state, S Brazil, an inland port on the São Gonçalo canal. It is a major export point for the stock-raising region of S Rio Gr...

North America

(Encyclopedia)CE5 North America, third largest continent (2015 est. pop. 571,949,000), c.9,400,000 sq mi (24,346,000 sq km), the northern of the two continents of the Western Hemisphere. North America includes a...

Berlin, city, Germany

(Encyclopedia)Berlin bûrˌlĭnˈ, Ger. bĕrlēnˈ [key], city (2021 est. pop. 3,567,000), capital ...

circle

(Encyclopedia)CE5 Circle circle, closed plane curve consisting of all points at a given distance from some fixed point, called the center. A circle is a conic section cut by a plane perpendicular to the axis of...

Chouteau

(Encyclopedia)Chouteau sho͞otōˈ [key], family of American fur traders. René Auguste Chouteau, 1749–1829, b. New Orleans, accompanied (1763) his stepfather, Pierre Laclede, on a trading expedition to the Illin...

antifreeze

(Encyclopedia)antifreeze, substance added to a solvent to lower its freezing point. The solution formed is called an antifreeze mixture. Antifreeze is typically added to water in the cooling system of an internal-c...

altazimuth coordinate system

(Encyclopedia)altazimuth coordinate system ăltăzˈəməth [key] or horizon coordinate system, astronomical coordinate system in which the position of a body on the celestial sphere is described relative to an obs...

center of mass

(Encyclopedia)center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with the center of t...

symmetry, biological

(Encyclopedia)symmetry, biological, similarity or balance between parts of an organism so that when a straight cut is made through a point or along a line, equal, mirror-image halves are formed. Symmetry in body sh...

Charleston, cities, United States

(Encyclopedia)Charleston. 1 City (2020 pop. 17,286), seat of Coles co., E Ill.; inc. 1835. Charleston is an industrial, rail, and trade center located in an ...