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Buena Vista, battle of

(Encyclopedia)Buena Vista, battle of, military engagement in the Mexican War, fought Feb. 22–23, 1847. The battle site was just S of Saltillo, Coahuila, in Mexico. Gen. Zachary Taylor, disobeying orders from the ...

buffalo grass

(Encyclopedia)buffalo grass, low perennial grass (Buchloe dactyloides) of the plains regions, one of the most important range grasses. Its dense matted growth is valuable also in erosion control. Buffalo grass usua...

Waves

(Encyclopedia)Waves (Women Appointed for Voluntary Emergency Service), U.S. navy organization, created (1942) in World War II to release male naval personnel for sea duty. The organization was commanded until 1946 ...

Khamenei, Ali

(Encyclopedia)Khamenei, Ali (Mohammad Ali Hoseyn Khamenei) mōhämädˈ älēˈ hōsānˈ khamānāēˈ [key], 1939–, Iranian religious and political leader, b. Mashhad. A Shiite Islamic cleric who was the son of...

Harriman, Edward Henry

(Encyclopedia)Harriman, Edward Henry, 1848–1909, American railroad executive, b. Hempstead, N.Y.; father of William Averell Harriman. He became a stockbroker in New York City and soon entered the railroad field, ...

Frick, Henry Clay

(Encyclopedia)Frick, Henry Clay, 1849–1919, American industrialist, b. Westmoreland co., Pa. He worked on his father's farm, was a store clerk, and did bookkeeping before he and several associates organized (1871...

Ghent, Treaty of

(Encyclopedia)Ghent, Treaty of, 1814, agreement ending the War of 1812 between the United States and Great Britain. It was signed at Ghent, Belgium, on Dec. 24, 1814, and ratified by the U.S. Senate in Feb., 1815. ...

fuzzy logic

(Encyclopedia)fuzzy logic, a multivalued (as opposed to binary) logic developed to deal with imprecise or vague data. Classical logic holds that everything can be expressed in binary terms: 0 or 1, black or white, ...

Alcatraz

(Encyclopedia)Alcatraz ălˈkətrăzˌ [key] [Sp. Álcatraces=pelicans], rocky island in San Francisco Bay, W Calif, about one mile (1.61 km) north of San Francisco. Alcatraz was first sighted by the Spanish in 177...

fatigue, in physiology

(Encyclopedia)fatigue, in physiology, inability to perform reasonable and necessary physical or mental activity. Muscle fatigue, for example, results when the contractile properties of muscle are reduced, and conti...