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marine biology

(Encyclopedia)marine biology, study of ocean plants and animals and their ecological relationships. Marine organisms may be classified (according to their mode of life) as nektonic, planktonic, or benthic. Nektonic...

merchant marine

(Encyclopedia)merchant marine: see shipping.

marine insurance

(Encyclopedia)marine insurance: see insurance. ...

marine pollution

(Encyclopedia)marine pollution: see water pollution. ...

Senate, United States

(Encyclopedia)Senate, United States: see Congress of the United States. ...

United States Air Force Academy

(Encyclopedia)United States Air Force Academy, at Colorado Springs, Colo.; for training young men and women to be officers in the U.S. air force; authorized in 1954 by Congress. Temporary quarters were opened at th...

Yuma, city, United States

(Encyclopedia)Yuma yo͞oˈ mə [key], city (1990 pop. 54,923), seat of Yuma co., extreme SW Ariz., on the eastern bank of the Colorado River near the confluence of the Gila River; founded 1854, inc. as a city 1914....

marine engine

(Encyclopedia)marine engine, machine for the propulsion of watercraft. The earliest marine power plants, reciprocating steam engines, were used almost exclusively until the early 1900s. In later ship construction t...

Civilian Conservation Corps

(Encyclopedia)Civilian Conservation Corps (CCC), established in 1933 by the U.S. Congress as a measure of the New Deal program. The CCC provided work and vocational training for unemployed single young men through ...

State, United States Department of

(Encyclopedia)State, United States Department of, executive department of the federal government responsible, under the President's direction, for the making and execution of American foreign policy. Before and ...