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pitchblende
(Encyclopedia)pitchblende pĭchˈblĕndˌ [key], dark, lustrous, heavy mineral, a source of radium and uranium. Largely natural uranium oxides, triuranium octaoxide (U3O8) and uranium dioxide (UO2), it usually cont...nursery school
(Encyclopedia)nursery school, educational institution for children from two to four years of age. It is distinguishable from a day nursery in that it serves children of both working and nonworking parents, rarely r...Gregoras, Nicephorus
(Encyclopedia)Gregoras, Nicephorus nīsĕfˈərəs grĕgˈərəs [key], c.1295–c.1359, Byzantine historian and theologian, one of the most learned men of his time. Among his scientific and philosophical works is ...Webb Space Telescope
(Encyclopedia)Webb Space Telescope or James Webb Space Telescope (JWST), is an infrared space telescope, the largest in space at its launc...Casamance
(Encyclopedia)Casamance kăzˈəmäns [key], river, c.200 mi (320 km) long, W Africa. It rises in S Senegal and flows westward, emptying in the Atlantic Ocean. The virtually unnavigable river lies in a region of lu...Castile–La Mancha
(Encyclopedia)Castile–La Mancha kăstēlˈ–lä mänˈchə [key], autonomous community, 30,680 s...alcohol
(Encyclopedia) CE5 Alcohols alcohol, any of a class of organic compounds with the general formula R–OH, where R represents an alkyl group made up of carbon and hydrogen in various proportions and –OH represe...Morse, Wayne Lyman
(Encyclopedia)Morse, Wayne Lyman, 1900–1974, U.S. Senator (1945–69), b. Madison, Wis. He was a professor of law and later dean at the Univ. of Oregon law school (1931–44) and gained a nationwide reputation as...Igor, d. 945, duke of Kiev
(Encyclopedia)Igor ēˈkhər [key], d. 945, duke of Kiev (912–45), successor of Oleg as ruler of Kievan Rus. According to the Russian Primary Chronicle, a medieval history, Igor was the son of Rurik, founder of t...Lea, Henry Charles
(Encyclopedia)Lea, Henry Charles lē [key], 1825–1909, U.S. historian, b. Philadelphia. He was associated with the family publishing business for many years, but his real interest was in historical work. Working ...Browse by Subject
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