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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...

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...

shape memory

(Encyclopedia)shape memory, property possessed by certain alloys that allows them to return, when heated, to their original shape after having been deformed. This effect results because, as the alloy is deformed, i...

Raman, Sir Chandrasekhara Venkata

(Encyclopedia)Raman, Sir Chandrasekhara Venkata chŭnˈdrəsĕkärə vĕngˈkətə räˈmən [key], 1888–1970, Indian physicist. He was professor of physics at Calcutta Univ. from 1917 to 1933. In Bangalore (now ...

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...

Vakhtangov, Yevgeni

(Encyclopedia)Vakhtangov, Yevgeni yĭvgāˈnyē väkhtänˈgôf [key], 1883–1922, Russian actor, producer, and founder of the Moscow theater that bears his name. A pupil and friend of Stanislavsky, Vakhtangov joi...

cat's-eye

(Encyclopedia)cat's-eye, gemstone that displays a thin band of reflected light on its surface when cut as a cabochon. Its name is derived from its supposed resemblance to the eye of a cat. The optical effect, known...

Abbot, Charles Greeley

(Encyclopedia)Abbot, Charles Greeley, 1872–1973, American astrophysicist, b. Wilton, N.H. He was acting director in 1896 and director in 1907 of the astrophysical observatory of the Smithsonian Institution; he wa...