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Erie Canal

(Encyclopedia)Erie Canal, artificial waterway, c.360 mi (580 km) long; connecting New York City with the Great Lakes via the Hudson River. Locks were built to overcome the 571-ft (174-m) difference between the leve...

Luzon

(Encyclopedia)Luzon lo͞ozŏnˈ [key], island (1990 pop. 30,797,458), 40,420 sq mi (104,688 sq km), largest, most populous, and most important of the Philippine Islands. As the major island, Luzon has played the ...

Long Island, island, United States

(Encyclopedia)Long Island (1990 pop. 6,861,454), 1,723 sq mi (4,463 sq km), 118 mi (190 km) long, and from 12 to 20 mi (19–32 km) wide, SE N.Y.; fourth largest island of the United States and the largest outside ...

Calles, Plutarco Elías

(Encyclopedia)Calles, Plutarco Elías plo͞otärˈkō ālēˈäs käˈyās [key], 1877–1945, Mexican statesman, president (1924–28). In 1913 he left schoolteaching to fight with Álvaro Obregón and Venustiano ...

bossism

(Encyclopedia)bossism, in U.S. history, system of political control centering about a single powerful figure (the boss) and a complex organization of lesser figures (the machine) bound together by reciprocity in pr...

adaptation

(Encyclopedia)adaptation, in biology, has several meanings. It can mean the adjustment of living matter to environmental conditions and to other living things either in an organism's lifetime (physiological adaptat...

physiocrats

(Encyclopedia)physiocrats fĭzˈēəkrătsˌ [key], school of French thinkers in the 18th cent. who evolved the first complete system of economics. They were also referred to simply as “the economists” or “th...

Caribbean Sea

(Encyclopedia)Caribbean Sea kârˌĭbēˈən, kərĭbˈēən [key], tropical sea, c.970,000 sq mi (2,512,950 sq km), arm of the Atlantic Ocean, Central America. It is bordered on the N and E by the West Indies arch...

public health

(Encyclopedia)public health, field of medicine and hygiene dealing with the prevention of disease and the promotion of health by government agencies. In the United States, public health authorities are engaged in m...

pyramid, structure

(Encyclopedia)pyramid. The true pyramid exists only in Egypt and Sudan, though the term has also been applied to similar structures in other countries. Egyptian pyramids are square in plan and their triangular side...