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Oleg

(Encyclopedia)Oleg ôlĕkhˈ [key], d. c.912, founder of Kievan Rus. Succeeding his kinsman Rurik as leader of the Varangians at Novgorod, Oleg led forth his retainers to seize Kiev (c.879). He made Kiev his capita...

psoriasis

(Encyclopedia)psoriasis sôrīˈəsĭs [key], occasionally acute but usually chronic and recurrent inflammation of the skin. The exact cause is unknown, but the disease appears to be an inherited, possibly autoimmu...

Ramos, Fidel Valdez

(Encyclopedia)Ramos, Fidel Valdez fēdĕlˈ väldĕsˈ räˈmōs [key], 1928–, Philippine general and politician, president of the Philippines (1992–98), b. Lingayen. A career army officer, he became deputy chi...

Kinnock, Neil Gordon

(Encyclopedia)Kinnock, Neil Gordon kĭnˈək [key], 1942–, British politician, b. Tredegar, Wales. The son of a miner, he studied at University College, Cardiff. In 1970 he was elected to Parliament as a Labour p...

Ignarro, Louis Joseph

(Encyclopedia)Ignarro, Louis Joseph, 1941–. American pharmacologist, b. Brooklyn, N.Y., Ph.D. Univ. of Minnesota, 1966. He was on the faculty at Tulane Univ. from 1979 to 1985, when he became a professor at the U...

Kaelin, William George, Jr.

(Encyclopedia)Kaelin, William George, Jr., 1957–, American oncologist, b. New York City, M.D. Duke Univ., 1982. He has spent his entire career at the Dana-Farber Cancer Institute, Boston, Mass., and also is a pro...

Kosinski, Jerzy

(Encyclopedia)Kosinski, Jerzy jrˈzē kəzĭnˈskē [key], 1933–91, American writer, b. Łódź, Poland. He taught at the Univ. of Łódź before emigrating to the United States in 1957. In his best-known novel, ...

decimal system

(Encyclopedia)decimal system [Lat.,=of tenths], numeration system based on powers of 10. A number is written as a row of digits, with each position in the row corresponding to a certain power of 10. A decimal point...

viscosity

(Encyclopedia)viscosity, resistance of a fluid to flow. This resistance acts against the motion of any solid object through the fluid and also against motion of the fluid itself past stationary obstacles. Viscosity...

sleep apnea

(Encyclopedia)sleep apnea, episodes of interrupted breathing during sleep. Obstructive sleep apnea is a common disorder in which relaxation of muscles in the throat repeatedly close off the airway during sleep; the...