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ceilometer

(Encyclopedia) ceilometerceilometersēlŏmˈĭtər [key], in aviation and meteorology, automatic instrument used to record ceiling, i.e., the altitude of the lowest cloud layer covering more than half of…

Oppenheimer, J. Robert

(Encyclopedia) Oppenheimer, J. RobertOppenheimer, J. Robertŏpˈənhīˌmər [key], 1904–67, American physicist, b. New York City, grad. Harvard (B.A., 1925), Ph.D. Univ. of Göttingen, 1927. He taught at…

genetic testing

(Encyclopedia) genetic testing, medical screening for genetic disorders, by examining either a person's DNA directly or a person's biochemistry or chromosomes for indirect evidence. Testing may be…

defibrillator

(Encyclopedia) defibrillator, device that delivers an electrical shock to the heart in order to stop certain forms of rapid heart rhythm disturbances (arrhythmias). The shock changes a fibrillation…

Du Pont, Pierre Samuel

(Encyclopedia) Du Pont, Pierre Samuel, 1870–1954, American industrialist, b. Wilmington, Del., grad. Massachusetts Institute of Technology, 1890. Du Pont worked as a chemist with the family's company…

Duvalier, Jean-Claude

(Encyclopedia) Duvalier, Jean-ClaudeDuvalier, Jean-ClaudezhäN-klōd [key]Duvalier, Jean-Claude düvälyāˈ [key], 1951–2014, president of Haiti (1971–86). At age 19, he was proclaimed “president for life…

easement

(Encyclopedia) easement, in law, the right to use the land of another for a specified purpose, as distinguished from the right to possess that land. If the easement benefits the holder personally and…

Humala Tasso, Ollanta Moisés

(Encyclopedia) Humala Tasso, Ollanta Moisés, 1962–, Peruvian army officer and political leader, b. Lima. The son of a labor lawyer, Humala joined the Peruvian army in 1982, became an officer, and…

Herndon, William Henry

(Encyclopedia) Herndon, William Henry, 1818–91, friend, law partner, and biographer of Abraham Lincoln, b. Greensburg, Ky. In 1844 he became the junior member of the Springfield, Ill., law firm of…

psychokinesis

(Encyclopedia) psychokinesis, movement or deformation of a physical object by thought or willpower alone (i.e., without the application of physical force). Telekinesis (sometimes abbreviated TK), an…