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Lexington and Concord, battles of

(Encyclopedia)Lexington and Concord, battles of, opening engagements of the American Revolution, Apr. 19, 1775. After the passage (1774) of the Intolerable Acts by the British Parliament, unrest in the colonies inc...

Schism of East and West

(Encyclopedia)Schism of East and West, division between the Orthodox Eastern Church and the Roman Catholic Church. See Christianity; Ferrara-Florence, Council of; Leo IX, Saint; Lyons, Second Council of; papacy; Ph...

Adam and Eve, Life of

(Encyclopedia)Adam and Eve, Life of, early Jewish work included in the collection known as the Old Testament Pseudepigrapha. It was probably written in Hebrew between 100 b.c. and a.d. 100. Based on the Old Testame...

Rhodesia and Nyasaland, Federation of

(Encyclopedia)Rhodesia and Nyasaland, Federation of, SE Africa, 1953–63, composed of the self-governing British colony of Southern Rhodesia and the British protectorates of Northern Rhodesia and Nyasaland. The ca...

atomic clock

(Encyclopedia)atomic clock, electric or electronic timekeeping device that is controlled by atomic or molecular oscillations. A timekeeping device must contain or be connected to some apparatus that oscillates at a...

materialism

(Encyclopedia)materialism, in philosophy, a widely held system of thought that explains the nature of the world as entirely dependent on matter, the fundamental and final reality beyond which nothing need be sought...

psycholinguistics

(Encyclopedia)psycholinguistics, the study of psychological states and mental activity associated with the use of language. An important focus of psycholinguistics is the largely unconscious application of grammati...

Lindemann, Frederick Alexander

(Encyclopedia)Lindemann, Frederick Alexander (Viscount Cherwell) lĭnˈdəmən, chärˈwĕl [key], 1886–1957, British physicist and government official. He studied with W. H. Nernst and developed with him the Ner...

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