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rhenium

(Encyclopedia)rhenium rēˈnēəm [key], metallic chemical element; symbol Re; at. no. 75; at. wt. 186.207; m.p. about 3,180℃; b.p. about 5,625℃; sp. gr. 21.02 at 20℃; valence −1, +2, +3, +4, +5, +6, or +7....

Mandan, indigenous people of North America

(Encyclopedia)Mandan mănˈdăn, –dən [key], indigenous people of North America whose language belongs to the Siouan branch of the Hokan-Siouan linguistic stock (see Native American languages). The Mandan were a...

Conservative party, Canadian political party

(Encyclopedia)Conservative party, in Canada. 1 Former Canadian political party that merged with the Progressive party to form the Progressive Conservative party. 2 Officially the Conservative party of Canada, polit...

Schweitzer, Albert

(Encyclopedia)Schweitzer, Albert älˈbĕrt shvīˈtsər [key], 1875–1965, Alsatian theologian, musician, and medical missionary. Determined to become a medical missionary, he obtained a doctorate in medicine at ...

Plath, Sylvia

(Encyclopedia)Plath, Sylvia, 1932–63, American poet, b. Boston. Educated at Smith College and Cambridge, Plath published poems even as a child and won many academic and literary awards. Her first volume of poetry...

Piero della Francesca

(Encyclopedia)Piero della Francesca pyĕˈrō dĕlˈlä fränchāsˈkä [key], c.1420–1492, major Italian Renaissance painter, b. Borgo San Sepolcro (modern Sansepolcro). All his masterpieces were created in town...

Tecumseh

(Encyclopedia)Tecumseh tĭkŭmˈsē [key], 1768?–1813, chief of the Shawnee, b. probably in Clark co., Ohio. Among his people he became distinguished for his prowess in battle, but he opposed the practice of tort...

Las Vegas

(Encyclopedia)Las Vegas läs vāˈgəs [key], city (1990 pop. 258,295), seat of Clark co., S Nev.; inc. 1911. It is the largest city in Nevada and the center of one of the fastest-growing urban areas in the United ...

heart, artificial

(Encyclopedia)heart, artificial, external or surgically implanted mechanical device designed to replace a patient's diseased heart. The first one used on a human being, the Jarvik-7, was implanted (1982) in Barney ...

Helena

(Encyclopedia)Helena. 1 City (2020 pop. 20,633), Jefferson and Shelby cos., central Ala.; inc. 1877. White settlers began to occupy the area after the War of ...