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anticyclone

(Encyclopedia) anticyclone, region of high atmospheric pressure; anticyclones are commonly referred to as “highs.” The pressure gradient, or change between the core of the anticyclone and its…

New Economic Policy

(Encyclopedia) New Economic Policy (NEP), official economic reconstruction program of the USSR from 1921 to 1928. It replaced the economic policies of “war Communism” (1918–21), an emergency program…

Nouakchott

(Encyclopedia) NouakchottNouakchottnwäkshôtˈ [key], city (1991 est. pop. 500,000), capital of Mauritania and Nouakchott dist., W Mauritania, a port on the Atlantic Ocean. Located between the Atlantic…

nutria

(Encyclopedia) nutrianutrian&oomacr;ˈtrēə [key] or coypucoypukoiˈp&oomacr; [key], aquatic rodent, Myocastor coypus, of South America, introduced in the S United States for its fur, which is…

Mammoth Cave National Park

(Encyclopedia) Mammoth Cave National Park, 52,830 acres (21,396 hectares), central Kentucky, authorized 1926, est. 1941. Located in a hilly, forested region, it offers numerous outdoor activities. It…

paraplegia

(Encyclopedia) paraplegiaparaplegiapârˌəplēˈjēə [key], paralysis of the lower part of the body, commonly affecting both legs and often internal organs below the waist. When both legs and arms are…

Connery, Sean

(Encyclopedia) Connery, Sean, 1930-2020, Scottish film actor, b. Edinburgh, Scotland. Connery joined the Royal Navy in 1946, serving for three years…

fever

(Encyclopedia) fever, elevation of body temperature above the normal level, which in humans is about 98℉ (37℃) when measured orally. Fever is considered to be a symptom of a disorder rather than a…

Yucca Mountain

(Encyclopedia) Yucca Mountain, mountain in the SW Nevada desert about 100 mi (161 km) northwest of Las Vegas. It is the proposed site of a Dept. of Energy (DOE) repository for up to 77,000 metric…

Black Hills

(Encyclopedia) Black Hills, rugged mountains, c.6,000 sq mi (15,540 sq km), enclosed by the Belle Fourche and Cheyenne rivers, SW S.Dak. and NE Wyo., and rising c.2,500 ft (760 m) above the…