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Pachycephalosaurus

(Encyclopedia)Pachycephalosaurus păkˌĭsĕfˌəlōsôrˈəs [key] [Gr., = thick-headed lizard], bipedal herbivorous dinosaur of the late Cretaceous period, approximately 68–65 million years ago. Its disting...

Spokan

(Encyclopedia)Spokan or Spokane both: spōkănˈ [key], Native North Americans whose language belongs to the Salishan branch of the Algonquian-Wakashan linguistic stock (see Native American languages). In the early...

corundum

(Encyclopedia)corundum kərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal system and in mass...

Carrington, Henry Beebee

(Encyclopedia)Carrington, Henry Beebee, 1824–1912, U.S. army officer and historian, b. Wallingford, Conn., grad. Yale, 1845, and afterward studied at Yale Law School. Carrington ably reorganized the Ohio state mi...

state flowers

(Encyclopedia)state flowers. Each state of the United States has designated, usually by legislative action, one flower as its floral emblem; the rose has been designated by Congress as the national flower of the Un...

Knight, Frank Hyneman

(Encyclopedia)Knight, Frank Hyneman, 1885–1972, American economist, b. McLean County, Ill., Ph.D. Cornell, 1916. He taught economics at the Univ. of Chicago (1927–62). Knight's most influential work was his fir...

Edgeworth, Francis Ysidro

(Encyclopedia)Edgeworth, Francis Ysidro əsēˈdrōˌ [key], 1845–1926, British economist, grad. Trinity College, Dublin. He was professor of political economy at Oxford and first editor (1891–1926) of the Econ...

Rocky Mountains

(Encyclopedia)Rocky Mountains, major mountain system of W North America and easternmost belt of the North American cordillera, extending more than 3,000 mi (4,800 km) from central N.Mex. to NW Alaska; Mt. Elbert (1...

gross national product

(Encyclopedia)gross national product (GNP), in economics, a quantitative measure of a nation's total economic activity, generally assessed yearly or quarterly. In estimating the GNP, only the final value of a produ...

Prairie Pothole Region

(Encyclopedia)Prairie Pothole Region, large geographic area of central North America consisting of grass-covered wetlands. Stretching northwest from N Iowa through SW Minnesota, E South Dakota, E and N North Dakota...