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Orvieto

(Encyclopedia) OrvietoOrvietoōrvyĕˈtō [key], city (1991 pop. 21,419), in Umbria, central Italy, on the Poglia River. Situated at the top of a rocky hill, it is a tourist and pilgrimage center.…

Peter, Saint

(Encyclopedia) Peter, Saint, d. a.d. 64?, most prominent of the Twelve Apostles, listed first in the Gospels, and traditionally the first bishop of Rome. His original name was Simon, but Jesus gave…

lichen

(Encyclopedia) lichenlichenlīˈkən [key], usually slow-growing organism of simple structure, composed of fungi (see Fungi) and photosynthetic green algae or cyanobacteria living together in a…

Coleman, Ornette

(Encyclopedia) Coleman, Ornette, 1930–2015, African-American saxophonist and composer, b. Fort Worth, Tex. Largely self-taught, he began playing the alto saxophone in rhythm-and-blues bands. He later…

Cumbria

(Encyclopedia) Cumbria, county, 2,635 sq mi (6,826 sq km), extreme NW England. The county stretches from the Morecambe Bay to Soloway Firth along the…

geochemistry

(Encyclopedia) geochemistry, study of the chemical changes on the earth. More specifically, it is the study of the absolute and relative abundances of chemical elements in the minerals, soils, ores,…

geologic timescale

(Encyclopedia) CE5 geologic timescale, a chronological scale of earth's history used to measure the relative or absolute age of any part of geologic time. Of the numerous timescales, the most…

isopleth

(Encyclopedia) isoplethisoplethīˈsəplĕthˌ [key], line drawn on a map through all points of equal value of some measurable quantity. In many meteorologic, oceanographic, or geologic studies some…

Lucas van Leyden

(Encyclopedia) Lucas van LeydenLucas van Leydenlüˈkäs vän līˈdən [key], 1494–1533, Dutch historical and genre painter and engraver. With Lucas, Dutch painting of scenes from daily life may be said to…

Leibovitz, Annie

(Encyclopedia) Leibovitz, AnnieLeibovitz, Annielēbˈəvĭts [key], 1949–, American photographer, b. Waterbury, Conn., as Anna-Lou Leibovitz. A celebrated portrait photographer, she began contributing…