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thorium
(Encyclopedia)thorium thôrˈēəm [key] [from Thor], radioactive chemical element; symbol Th; at. no. 90; mass number of most stable isotope 232; m.p. about 1,750℃; b.p. about 4,790℃; sp. gr. 11.7 at 20℃; va...week
(Encyclopedia)week, period of time shorter than the month, commonly seven days. The ancient Egyptians used a 10-day period, as did the French under the short-lived French Revolutionary calendar. In many regions a f...Ruthven
(Encyclopedia)Ruthven rĭvˈən, ro͞othˈvən [key], Scottish noble family, believed to trace its ancestry to Thor, a Saxon or Dane, who settled in Scotland in the reign of David I. The name is derived from lands ...Germanic religion
(Encyclopedia)Germanic religion, pre-Christian religious practices among the tribes of Western Europe, Germany, and Scandinavia. The main sources for our knowledge are the Germania of Tacitus and the Elder Edda and...Easter Island
(Encyclopedia)Easter Island, Span. Isla de Pascua, Polynesian Rapa Nui, remote island (2020 est. pop. 5,000), 66 sq mi (171 sq km), in the South Pacific, c.2,200 ...oak
(Encyclopedia)oak, any tree or shrub of the genus Quercus of the family Fagaceae (beech family). This complex genus includes as many as 600, found chiefly in north temperate zones and also in Polynesia. The more so...Oslo
(Encyclopedia)Oslo äzˈlō, äsˈ–, Nor. o͝osˈlo͝o [key], city (1995 pop. 482,555), capital of Norway, of Akershus co., and of Oslo co. (175 sq mi/453 sq km), SE Norway, at the head of the Oslofjord (a deep i...Old Norse literature
(Encyclopedia)Old Norse literature, the literature of the Northmen, or Norsemen, c.850–c.1350. It survives mainly in Icelandic writings, for little medieval vernacular literature remains from Norway, Sweden, or D...Browse by Subject
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