Columbia Encyclopedia

Search results

500 results found

neutrino astronomy

(Encyclopedia)neutrino astronomy, study of stars by means of their emission of neutrinos, fundamental particles that result from nuclear reactions and are emitted by stars along with light. Approximately 100 billio...

epistemology

(Encyclopedia)epistemology ĭpĭsˌtəmŏlˈəjē [key] [Gr.,=knowledge or science], the branch of philosophy that is directed toward theories of the sources, nature, and limits of knowledge. Since the 17th cent. e...

Froebel, Friedrich Wilhelm August

(Encyclopedia)Froebel, Friedrich Wilhelm August frāˈbəl, frōˈ–, Ger. frēˈdrĭkh vĭlˈhĕlm ouˈgo͝ost fröˈbəl [key], 1782–1852, German educator and founder of the kindergarten system. He had an unha...

stratosphere

(Encyclopedia)stratosphere strătˈəsfēr [key], second lowest layer of the earth's atmosphere. The level from which it extends outward varies with latitude; it begins c.51⁄2 mi (9 km) above the poles, c.6 or 7 ...

Lumumba, Patrice Emergy

(Encyclopedia)Lumumba, Patrice Emergy pətrēsˈ ĕmârzhēˈ lo͞omo͞omˈbä [key], 1925–61, pr...

molding

(Encyclopedia)CE5 Moldings molding, in architecture, furniture, and decorative objects, a surface or group of surfaces of projecting or receding contours. A molding may serve as a defining element, terminating ...

Armada, Spanish

(Encyclopedia)Armada, Spanish ärmäˈdə [key], 1588, fleet launched by Philip II of Spain for the invasion of England, to overthrow the Protestant Elizabeth I and establish Philip on the English throne; also call...

Know-Nothing movement

(Encyclopedia)Know-Nothing movement, in U.S. history. The increasing rate of immigration in the 1840s encouraged nativism. In Eastern cities where Roman Catholic immigrants especially had concentrated and were welc...

Revere, Paul

(Encyclopedia)Revere, Paul, 1735–1818, American silversmith and political leader in the American Revolution, b. Boston. In his father's smithy he learned to work gold and silver, and he became a leading silversmi...

Richard III

(Encyclopedia)Richard III, 1452–85, king of England (1483–85), younger brother of Edward IV. Created duke of Gloucester at Edward's coronation (1461), he served his brother faithfully during Edward's lifetime�...