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Kootenai, river, Canada and the United States

(Encyclopedia)Kootenai ko͞oˈtĭnā [key], river, 407 mi (655 km) long, rising in the Rocky Mts., SE British Columbia, Canada. It flows S into NW Montana, NW through N Idaho, then N into Canada. There it flows thr...

Yukon, river, Canada and the United States

(Encyclopedia)Yukon yo͞oˈkŏn [key], river, c.2,000 mi (3,220 km) long, rising in Atlin Lake, NW British Columbia, Canada, and receiving numerous headwater streams; one of the longest rivers of North America. It ...

thymus gland

(Encyclopedia)thymus gland thīˈməs [key], mass of glandular tissue located in the neck or chest of most vertebrate animals. In humans, the thymus is a soft, flattened, pinkish-gray organ located in the upper che...

blood transfusion

(Encyclopedia)blood transfusion, transfer of blood from one person to another, or from one animal to another of the same species. Transfusions are performed to replace a substantial loss of blood and as supportive ...

corporative state

(Encyclopedia)corporative state, economic system inaugurated by the Fascist regime of Benito Mussolini in Italy. It was adapted in modified form under other European dictatorships, among them Adolf Hitler's Nationa...

Doudna, Jennifer Anne

(Encyclopedia)Doudna, Jennifer Anne, 1964–, American biochemist, b. Washington, D.C., Ph.D. Harvard Medical School, 1989. Doudna was a professor at Yale from 1994 to 2002, when she joined the faculty at the Univ....

Martin, William McChesney, Jr.

(Encyclopedia)Martin, William McChesney, Jr., 1906–98, U.S. banker, chairman of the Board of Governors of the Federal Reserve System (1951–70), b. St. Louis. After an early career as a stockbroker, Martin becam...

ampere

(Encyclopedia)ampere ămˈpēr [key], abbr. amp or A, basic unit of electric current. It is the fundamental electrical unit used with the mks system of units of the metric system. The ampere is officially defined a...

tachometer

(Encyclopedia)tachometer tăkŏmˈətər [key], instrument that indicates the speed, usually in revolutions per minute, at which an engine shaft is rotating. Some tachometers, especially those used in automobiles, ...

common-ion effect

(Encyclopedia)common-ion effect, decrease in solubility of an ionic salt, i.e., one that dissociates in solution into its ions, caused by the presence in solution of another solute that contains one of the same ion...