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mirage

(Encyclopedia)mirage mĭräzhˈ [key], atmospheric optical illusion in which an observer sees in the distance a nonexistent body of water or an image, sometimes distorted, of some object or of a complete scene. Exa...

Parti Québécois

(Encyclopedia)Parti Québécois pärtē kēbĕkwäˈ [key] (PQ), provincial political party committed to the independence of Quebec. Founded in 1968, it soon became a force in provincial elections. In 1976, led by ...

bromine

(Encyclopedia)bromine brōˈmēn, –mĭn [key] [Gr.,=stench], volatile, liquid chemical element; symbol Br; at. no. 35; at. wt. 79.904; m.p. –7.2℃; b.p. 58.78℃; sp. gr. of liquid 3.12 at 20℃; density of va...

bicameral system

(Encyclopedia)bicameral system bīkămˈərəl [key], governmental system dividing the legislative function between two chambers, an “upper,” such as the U.S. Senate and the British House of Lords, and a “low...

sleep

(Encyclopedia)sleep, resting state in which an individual becomes relatively quiescent and relatively unaware of the environment. During sleep, which is in part a period of rest and relaxation, most physiological f...

Smith, Adam

(Encyclopedia)Smith, Adam, 1723–90, Scottish economist, educated at Glasgow and Oxford. He became professor of moral philosophy at the Univ. of Glasgow in 1752, and while teaching there wrote his Theory of Moral ...

spintronics

(Encyclopedia)spintronics, spin electronics, or magnetoelectronics, science and technology that harnesses the spin state of electrons in addition to the electrical charge state to store data or perform calculation...

Supremes, The

(Encyclopedia) Supremes, The, American vocal group, 1962-77. The Supremes were formed in Detroit, Mi., and were originally known as the Primettes—a female counterp...

photoelectric cell

(Encyclopedia)CE5 Photoelectric cell: Light causes a photosensitive surface to emit electrons, which flow as current to the positive terminal. A galvanometer measures the current and thus indicates light intensi...

president

(Encyclopedia)president, in modern republics, the chief executive and, therefore, the highest officer in a government. Many nations of the world, including the United States, France, Germany, India, and the majorit...