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De Valera, Eamon

(Encyclopedia)De Valera, Eamon āˈmən dĕ vəlârˈə [key], 1882–1975, Irish statesman, b. New York City. He was taken as a child to Ireland. As a young man he joined the movement advocating physical force to ...

secret society

(Encyclopedia)secret society, organization of initiated persons whose members, purposes, and rituals are kept secret. Human groups throughout history have maintained secret societies. The ceremonies of initiation i...

nuclear weapons

(Encyclopedia)nuclear weapons, weapons of mass destruction powered by atomic, rather than chemical, processes. Nuclear weapons produce large explosions and hazardous radioactive byproducts by means of either nuclea...

ethics

(Encyclopedia)ethics, in philosophy, the study and evaluation of human conduct in the light of moral principles. Moral principles may be viewed either as the standard of conduct that individuals have constructed fo...

Hebrides, the

(Encyclopedia)Hebrides, the hĕbˈrĭdēz [key], Western Isles, or Western Islands, group of more than 50 islands, W and NW Scotland. Less than a fifth of the islands are inhabited. The Outer Hebrides (sometimes al...

Tweed, William Marcy

(Encyclopedia)Tweed, William Marcy, 1823–78, American politician and Tammany leader, b. New York City. A bookkeeper, he became (1848) a volunteer fireman and as a result acquired influence in his ward. He was an ...

Welles, Orson

(Encyclopedia)Welles, Orson, 1915–85, American actor, director, and producer, b. Kenosha, Wis. From childhood he evinced a precocious talent and lofty sense of self-assurance in theatrical matters. He began actin...

London Company

(Encyclopedia)London Company, corporation composed of stockholders residing in and about London, which, together with the Plymouth Company (see Virginia Company), was granted (1606) a charter by King James I to fou...

determinant

(Encyclopedia)determinant, a polynomial expression that is inherent in the entries of a square matrix. The size n of the square matrix, as determined from the number of entries in any row or column, is called the o...
 

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