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An area or a region distinguished from adjacent parts by a distinctive feature or characteristic.
(noun)
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Any of the five regions of the surface of the earth that are loosely divided according to prevailing climate and latitude, including the Torrid Zone, the North and South Temperate zones, and the North and South Frigid zones.
(noun)
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A similar division on any other planet.
(noun)
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Mathematics A portion of a sphere bounded by the intersections of two parallel planes with the sphere.
(noun)
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Ecology An area characterized by distinct physical conditions and populated by communities of certain kinds of organisms.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.