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Amsdorf, Nikolaus von

(Encyclopedia)Amsdorf, Nikolaus von nēˈkōlous fən ämsˈdôrf [key], 1483–1565, German Protestant reformer. He became a devoted supporter of Martin Luther. Elector John Frederick I of Saxony appointed Amsdorf...

cancer, in medicine

(Encyclopedia)cancer, in medicine, common term for neoplasms, or tumors, that are malignant. Like benign tumors, malignant tumors do not respond to body mechanisms that limit cell growth. Unlike benign tumors, mali...

tenure, in law

(Encyclopedia)tenure, in law, manner in which property in land is held. The nature of tenure has long been of great importance, both in law and in the broader economic and political context. Tenure has varied great...

lime, in botany

(Encyclopedia)lime, in botany, small shrublike tree (Citrus aurantifolia) of the family Rutaceae (rue family), one of the citrus fruit trees, similar to the lemon but more spreading and irregular in growth. The tru...

Washington, Walter Edward

(Encyclopedia)Washington, Walter Edward, 1915–2003, American political figure, first African-American mayor of Washington, D.C. (1975–79) and of a major American city, b. Dawson, Ga., grad. Howard Univ. (A.B., ...

Hampton, Wade, American planter and soldier

(Encyclopedia)Hampton, Wade, c.1752–1835, American planter and soldier, b. Halifax co., Va. He served in the American Revolution and took part in South Carolina politics, opposing the ratification of the U.S. Con...

heart, in anatomy

(Encyclopedia)CE5 Cross section of heart, with arrows indicating direction of blood flow heart, muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activit...

American Museum of Natural History

(Encyclopedia)American Museum of Natural History, incorporated in New York City in 1869 to promote the study of natural science and related subjects. Buildings on its present site facing Central Park were opened in...

Dwight, Timothy, 1828–1916, American educator

(Encyclopedia)Dwight, Timothy, 1828–1916, American educator, b. Norwich, Conn., grad. Yale, 1849; grandson of Timothy Dwight (1752–1817). Appointed professor of sacred literature at Yale, he assisted in the reo...

ash, in botany

(Encyclopedia)ash, in botany, any plant of the genus Fraxinus of the family Oleaceae (olive family), trees and shrubs mainly of north temperate regions. The ashes are characterized by small clusters of greenish flo...