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Denison Dam
(Encyclopedia)Denison Dam, 17,200 ft (5,243 m) long, on the Red River along the Texas–Okla. border, NW of Denison, Tex. The dam, built by the U.S. Corps of Engineers for flood control and hydroelectric power, was...Dewdney, Anna
(Encyclopedia)Dewdney, Anna, 1965–2016, American children's book author and illustrator, b. Englewood Cliffs, N.J., as Anna Elizabeth Luhrmann, B.A. Wellesley, 1987. After illustrating adult and children's books ...Drew, Charles Richard
(Encyclopedia)Drew, Charles Richard, 1904–50, African-American physician, b. Washington, D.C. A surgeon and a professor at Howard Univ. (1935–36; 1942–50), he developed a means of preserving blood plasma for ...pigmentation
(Encyclopedia)pigmentation, name for the coloring matter found in certain plant and animal cells and for the color produced thereby. Pigmentation occurs in nearly all living organisms. Almost all plants synthesize ...spinel
(Encyclopedia)spinel, magnesium aluminum oxide, MgAl2O4, a mineral crystallizing in the isometric system, usually as octahedrons. It occurs as an accessory mineral in basic igneous rocks, in aluminum-rich metamorph...Punt
(Encyclopedia)Punt po͝ont [key], ancient land S of Egypt accessible by way of the Red Sea. Its exact location has not been identified, but it probably included the Somali coast. Temple reliefs at Deir el Bahari in...Doctrine of Signatures
(Encyclopedia)Doctrine of Signatures, the concept that the key to humanity's use of various plants was indicated by the form of the plant. The red sap of the bloodroot (Sanguinaria canadensis), for instance, was be...Grayson, Cary Travers
(Encyclopedia)Grayson, Cary Travers, 1878–1938, American naval officer and surgeon, b. Culpeper co., Va. As a physician he entered (1903) the U.S. navy, was graduated (1904) from the navy medical school, and afte...Palestine, city, United States
(Encyclopedia)Palestine pălˈəstēn [key], city (1990 pop. 18,042), seat of Anderson co., E Tex.; inc. 1871. It is a market, processing, and rail center for a rich oil area and for the truck crops, livestock, and...Page, Thomas Nelson
(Encyclopedia)Page, Thomas Nelson, 1853–1922, American author and diplomat, b. Hanover co., Va. His novels and stories are sentimental idealizations of the Old South. Among his novels are On Newfound River (1891)...Browse by Subject
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