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Halleck, Fitz-Greene

(Encyclopedia)Halleck, Fitz-Greene hălˈĭk [key], 1790–1867, American poet, b. Guilford, Conn. He was joint author, with Joseph Rodman Drake, of the humorous lampoons “Croaker Papers,” most of which were pr...

malachite

(Encyclopedia)malachite mălˈəkīt [key], a mineral, the green basic carbonate of copper occurring in crystals of the monoclinic system or (more usually) in masses. It is translucent or opaque; the luster is silk...

Arlen, Michael

(Encyclopedia)Arlen, Michael, 1895–1956, English novelist, b. Bulgaria as Dikran Kuyumjian. The son of Armenian parents, he was brought to England as a child. In 1922 he became a British subject and changed his n...

Wright, James

(Encyclopedia)Wright, James, 1927–80, American poet, b. Ohio. He studied at Kenyon College and the Univ. of Washington. Wright was the master of an elegant, beautifully controlled style. His early poems contained...

Smith, Red

(Encyclopedia)Smith, Red (Walter Wellesley Smith), 1905–82, American sportswriter, b. Green Bay, Wis., grad. Notre Dame, 1927. After working on newspapers in St. Louis and Philadelphia, he began a syndicated colu...

sphalerite

(Encyclopedia)sphalerite sfălˈərīt, sfāˈ– [key], mineral composed of zinc sulfide, usually containing some iron and a little cadmium. It occurs in crystals of the isometric system but more generally in clea...

Rukeyser, Muriel

(Encyclopedia)Rukeyser, Muriel ro͞oˈkīsər [key], 1913–80, American poet, b. New York City. Her poetry expresses the beauty and passion in the confrontation between the individual and her constantly changing w...

Kamenev, Lev Borisovich

(Encyclopedia)Kamenev, Lev Borisovich lyĕf bərēˈsəvĭch käˈmĭnyĭf [key], 1883–1936, Soviet Communist leader. His original name was Rosenfeld. He joined (1901) the Social Democratic party and sided with t...

Eocene epoch

(Encyclopedia)Eocene epoch ēˈəsēnˌ [key], second epoch of the Tertiary period in the Cenozoic era of geologic time, from approximately 54.9 to 38 million years ago. The Eocene in North America was marked by th...

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 +...