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Watkins, Carleton Eugene
(Encyclopedia) Watkins, Carleton Eugene, 1829–1916, America's premier 19th-century landscape photographer, b. Oneonta, N.Y. Watkins created images that helped define the American West for his…Sandage, Allan Rex
(Encyclopedia) Sandage, Allan Rex, 1926–2010, American astronomer, b. Iowa City, Iowa, Ph.D. California Institute of Technology, 1953. He was a graduate student under Walter Baade and an assistant to…tetanus
(Encyclopedia) tetanustetanustĕtˈnəs, –ənəs [key] or lockjaw, acute infectious disease of the central nervous system caused by the toxins of Clostridium tetani. The organism has a widespread…depressant
(Encyclopedia) depressant, any one of various substances that diminish functional activity, usually by depressing the nervous system. Barbiturates, sedatives, alcohol, and meprobamate are all…Duvalier, François
(Encyclopedia) Duvalier, FrançoisDuvalier, FrançoisfräNswäˈ düvälyāˈ [key], 1907–71, dictator of Haiti (1957–71). A physician, he became director-general of the national public health service in 1946…gigantism
(Encyclopedia) gigantism, condition in which an animal or plant is far greater than normal in size. Plants are often deliberately bred to increase their size. However, among animals, gigantism is…weight
(Encyclopedia) weight, measure of the force of gravity on a body (see gravitation). Since the weights of different bodies at the same location are proportional to their masses, weight is often used…torque
(Encyclopedia) torque, in physics, that which tends to change the rate of rotation of a body; also called the moment of force. The torque produced by rotating parts of an electric motor or internal-…stellar structure
(Encyclopedia) stellar structure, physical properties of a star and the processes taking place within it. Except for that of the sun, astronomers must draw their conclusions regarding stellar…conduction
(Encyclopedia) conduction, transfer of heat or electricity through a substance, resulting from a difference in temperature between different parts of the substance, in the case of heat, or from a…Trending
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