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transpiration

(Encyclopedia)transpiration, in botany, the loss of water by evaporation in terrestrial plants. Some evaporation occurs directly through the exposed walls of surface cells, but the greatest amount takes place throu...

treaty

(Encyclopedia)treaty, in international law, formal agreement between sovereign states or organizations of states. The term treaty is ordinarily confined to important formal agreements, while less formal internation...

Costa, Lúcio

(Encyclopedia)Costa, Lúcio lo͞oˈsyo͝o kôˈstə [key], 1902–98, As the principal designer of the city of Brasília (1957), Costa is known for his use of reinforced concrete in designs that combine traditional...

heart-lung machine

(Encyclopedia)heart-lung machine, device that maintains the circulation of the blood and the oxygen content of the body when connected with the arteriovenous system; it is also called the pump oxygenator. The machi...

Haas, Arthur Erich

(Encyclopedia)Haas, Arthur Erich häs [key], 1884–1941, American physicist and educator, b. Bohemia. He was professor of physics at Vienna, Leipzig, London, and, from 1936, the Univ. of Notre Dame, South Bend, In...

Flüe, Nicholas von der, Saint

(Encyclopedia)Flüe, Nicholas von der, Saint fən dĕr flüˈə [key], 1417–87, Swiss patriot and folk hero. He was leader of the cantonal forces fighting Austria and counselor for many years to the duke of Saxon...

Nanteuil, Robert

(Encyclopedia)Nanteuil, Robert rōbĕrˈ näNtöˈyə [key], 1623?–1678, French draftsman and engraver. His pastel portraits gained him popularity, and in 1658 Louis XIV made him draftsman to the royal cabinet. H...

Achilles' tendon

(Encyclopedia)Achilles' tendon (tendo calcaneus) tĕnˈdō kălkāˈnēəs [key], sinew prominent at the back of the ankle, connecting the tendons of the calf muscles to the heelbone. When the musculature contracts...

Lyons, First Council of

(Encyclopedia)Lyons, First Council of lyôNˈ [key], 1245, 13th ecumenical council of the Roman Catholic Church, convened at Lyons, France, by Pope Innocent IV to deal with his struggle with Holy Roman Emperor Fred...

Arana Osorio, Carlos

(Encyclopedia)Arana Osorio, Carlos kärˈlōs äräˈnä ōsōˈryō [key], 1918–2003, president of Guatemala (1970–74). A conservative army colonel noted for his successes during an antiguerrilla campaign (196...