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neodymium

(Encyclopedia)neodymium nēˌōdĭmˈēəm [key], metallic chemical element; symbol Nd; at. no. 60; at. wt. 144.242; m.p. about 1,021℃; b.p. about 3,068℃; sp. gr. 7.004 at 20℃; valence +3. Neodymium is a lust...

praseodymium

(Encyclopedia)praseodymium prāˌzēōdĭmˈēəm, –sēō– [key] [Gr., =green twin], metallic chemical element; symbol Pr; at. no. 59; at. wt. 140.90765; m.p. 931℃; b.p. 3,512℃; sp. gr. about 6.8; valence +...

Hirst, Damien Steven

(Encyclopedia)Hirst, Damien Steven, 1965–, British artist-provacateur, b. Bristol. While at Goldsmiths College, London (grad. 1988), he organized the exhibition Freeze, whose participants, led by Hirst, became kn...

lanthanum

(Encyclopedia)lanthanum lănˈthənəm [key] [Gr.,=to lie hidden], metallic chemical element; symbol La; at. no. 57; at. wt. 138.90547; m.p. about 920℃; b.p. about 3,460℃; sp. gr. 6.19 at 25℃; valence +3. Lan...

dice, in games and gambling

(Encyclopedia)dice [plural of die], small cubes used in games. They are usually made of ivory, bone, wood, plastic, or similar materials. The six sides are numbered by dots from 1 to 6, so placed that the sum of th...

Early Christian art and architecture

(Encyclopedia)Early Christian art and architecture, works of art exhibiting Christian themes and structures designed for Christian worship created relatively soon after the death of Jesus. Most date from the 4th to...

earth, in geology and astronomy

(Encyclopedia)CE5 A. Cross section of the earth, showing its shells B. Detailed cross section of the crust and upper mantle: The lithosphere consists of the hard rock in the crust and upper mantle, lying above t...

Eden, rivers, England and Scotland

(Encyclopedia)Eden, name of several rivers in England and Scotland. The principal one rises in Cumbria, N England, and flows 65 mi (105 km) NW past Carlisle, into Solway Firth. The Vale of Eden is a rich farming re...

Denali National Park and Preserve

(Encyclopedia)Denali National Park and Preserve dənälˈē [key], in the Alaska Range, S central Alaska; comprising Denali National Park (4,740,912 acres/1,919,398 hectares), est. as Mt. McKinley National Park 191...

Dipper, Big, and Little Dipper

(Encyclopedia)Dipper, Big, and Little Dipper: see Ursa Major and Ursa Minor. ...