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behaviorism

(Encyclopedia)behaviorism, school of psychology which seeks to explain animal and human behavior entirely in terms of observable and measurable responses to environmental stimuli. Behaviorism was introduced (1913) ...

Tunis

(Encyclopedia)Tunis to͞onĭs [key], city (1994 pop. 674,100), capital of Tunisia, NE Tunisia, on the Lake of Tunis. Access to the Gulf of Tunis (an arm of the Mediterranean) is by a canal terminating at a subsidia...

Prodi, Romano

(Encyclopedia)Prodi, Romano rōmäˈnō prōˈdē [key], 1939–, Italian politician, premier of Italy (1996–98, 2006–8), b. Scandiano. Educated at the Catholic Univ. of Milan (grad. 1961), he. He is a trained ...

Quebec campaign

(Encyclopedia)Quebec campaign, 1775–76, of the American Revolution. The Continental Congress decided to send an expedition to Canada to protect the northern frontier from British attack and to persuade Canada to ...

Ollivier, Émile

(Encyclopedia)Ollivier, Émile āmēlˈ ôlēvyāˈ [key], 1825–1913, French statesman, a leading figure in the “Liberal Empire” of Napoleon III. Widely known as a brilliant lawyer, he was elected to the legi...

Amherst, Jeffery Amherst, Baron

(Encyclopedia)Amherst, Jeffery Amherst, Baron ămˈərst [key], 1717–97, British army officer. He served in the War of the Austrian Succession and in the early part of the Seven Years War. In 1758 he was sent to ...

antioxidant

(Encyclopedia)antioxidant, substance that prevents or slows the breakdown of another substance by oxygen. Synthetic and natural antioxidants are used to slow the deterioration of gasoline and rubber, and such antio...

electromotive series

(Encyclopedia)electromotive series, list of metals whose order indicates the relative tendency to be oxidized, or to give up electrons (see oxidation and reduction); the list also includes the gas hydrogen. The ele...

Guerrero

(Encyclopedia)Guerrero, state, 24,887 sq mi (64,457 sq km), S Mexico, on the Pacific Ocean. The capital is Chilpancingo. Dominated by the Sierra Madre del Sur, which ...