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Vulcan, in astronomy

(Encyclopedia)Vulcan, in astronomy, hypothetical planet whose existence was proposed by Le Verrier to explain part of the advance of the perihelion of Mercury, not all of which could be accounted for by gravitation...

adenoids

(Encyclopedia)adenoids ădˈənoidzˌ [key], common name for the pharyngeal tonsils, spongy masses of lymphoid tissue that occupy the nasopharynx, the space between the back of the nose and the throat. Normally the...

Boccioni, Umberto

(Encyclopedia)Boccioni, Umberto o͞ombĕrˈtō bŏt-chôˈnē [key], 1882–1916, Italian futurist painter and sculptor. He played a primary role in the drafting of the manifesto of futurism in 1910 and was the maj...

Bradley, Francis Herbert

(Encyclopedia)Bradley, Francis Herbert, 1846–1924, English philosopher. He was educated at Oxford, where he became a fellow of Merton College in 1876. His works include Ethical Studies (1876), Principles of Logic...

geology

(Encyclopedia)geology, science of the earth's history, composition, and structure, and the associated processes. It draws upon chemistry, biology, physics, astronomy, and mathematics (notably statistics) for suppor...

radio

(Encyclopedia)CE5 A. AM transmitter B. AM receiver radio, transmission or reception of electromagnetic radiation in the radio frequency range. The term is commonly applied also to the equipment used, especially...

Nolde, Emil

(Encyclopedia)Nolde, Emil āˈmēl nôlˈdə [key], 1867–1956, German expressionist painter and graphic artist. His original name was Emil Hansen. After teaching in Switzerland (1892–98), Nolde traveled through...

Nazca

(Encyclopedia)Nazca or Nasca both: näsˈkä [key], ancient culture of the Nazca, Pisco, and Ica river valleys on the desert coast of S Peru. Flourishing during the first millennium a.d., the Nazca culture seems to...

chartered companies

(Encyclopedia)chartered companies, associations for foreign trade, exploration, and colonization that came into existence with the formation of the European nation states and their overseas expansion. An associatio...

Gilbert, Sir Humphrey

(Encyclopedia)Gilbert, Sir Humphrey, 1537?–1583, English soldier, navigator, and explorer; half-brother of Sir Walter Raleigh. Knighted (1570) for his service in the campaigns in Ireland, he later (1572) served i...