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Huaynaputina

(Encyclopedia) Huaynaputina, volcano, 15,912 ft (4,850 m) high, Moquegua region, S Peru, in the central Andes. A stratovolcano, it lies on the W rim of the Río Tambo canyon and has several ash cones…

hue and cry

(Encyclopedia) hue and cry, formerly, in English law, pursuit of a criminal immediately after he had committed a felony. Whoever witnessed or discovered the crime was required to raise the hue and…

Gleason, Henry Allan

(Encyclopedia) Gleason, Henry AllanGleason, Henry Allanglēˈsən [key], 1882–1975, American botanist, plant geographer, and plant ecologist. His floristic studies of North American vegetation led to…

John VI, Byzantine emperor

(Encyclopedia) John VI (John Cantacuzene)John VIkănˌtəky&oomacr;zēnˈ [key], c.1292–1383, Byzantine emperor (1347–54). He was chief minister under Andronicus III, after whose death he proclaimed…

Rainalducci, Pietro

(Encyclopedia) Rainalducci or Rainallucci, PietroRainalducci or Rainallucci, Pietropyĕˈtrō rīnäld&oomacr;tˈchē, rīnäl-l&oomacr;tˈchē [key], d. 1333, Italian churchman (b. Corvaro, near Rieti…

Sabellius

(Encyclopedia) Sabellius, fl. 215, Christian priest and theologian, b. probably Libya or Egypt. He went to Rome, became the leader of those who accepted the doctrine of modalistic monarchianism, and…

shock wave

(Encyclopedia) shock wave, wave formed of a zone of extremely high pressure within a fluid, especially the atmosphere, that propagates through the fluid at a speed in excess of the speed of sound. A…

Secret Service, United States

(Encyclopedia) Secret Service, United States, a law enforcement division (since 2003) of the Dept. of Homeland Security. It was established in 1865 in the the Dept. of the Treasury to investigate and…

Pevsner, Sir Nikolaus

(Encyclopedia) Pevsner, Sir NikolausPevsner, Sir Nikolauspĕvzˈnər [key], 1902–83, English architectural historian, b. Germany. Influenced by Heinrich Wölfflin, Pevsner contended in his many works…

peritoneum

(Encyclopedia) peritoneumperitoneumpĕrətənēˈəm [key], multilayered membrane which lines the abdominal cavity, and supports and covers the organs within it. The part of the membrane that lines the…