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Halloween

(Encyclopedia)Halloween säˈwĭn [key], the beginning of winter and the Celtic new year. Spirits, or fairies, were said to roam the earth on this evening, playing tricks on human beings to mark the season of dimin...

Goodman, Benny

(Encyclopedia)Goodman, Benny (Benjamin David Goodman), 1909–86, American clarinetist, composer, and band leader, b. Chicago. Goodman studied clarinet at Hull House. In Chicago he had the opportunity to hear (and ...

episome

(Encyclopedia)episome ĕpˈĭsōm [key], unit of genetic material composed of a series of genes that sometimes has an independent existence in a host cell and at other times is integrated into a chromosome of the c...

species

(Encyclopedia)species, in biology, a category of classification, the original and still the basic unit in the demarcation of plant and animal types. The species marks the boundary between populations of organisms r...

race

(Encyclopedia)race, one of the group of populations regarded as constituting humanity. The differences that have historically determined the classification into races are predominantly physical aspects of appearanc...

Francis de Sales, Saint

(Encyclopedia)Francis de Sales, Saint, 1567–1622, French Roman Catholic preacher, Doctor of the Church, and key figure in the Counter Reformation in France. He was a member of an aristocratic family of Savoy and ...

Bakunin, Mikhail

(Encyclopedia)Bakunin, Mikhail mēkhəyēlˈ bəko͞oˈnyĭn [key], 1814–76, Russian revolutionary and leading exponent of anarchism. He came from an aristocratic family but entered upon revolutionary activities ...

differentiation

(Encyclopedia)differentiation, in biology, series of changes that occur in cells and tissues during development, resulting in their specialization. This, in turn, permits a greater variety of organisms. In plants, ...

Muller, Hermann Joseph

(Encyclopedia)Muller, Hermann Joseph mŭlˈər [key], 1890–1967, American geneticist and educator, b. New York City, grad. Columbia (B.A., 1910; Ph.D., 1916). A student of Thomas Hunt Morgan, he taught (1915–18...

Los Alamos

(Encyclopedia)Los Alamos lôs ălˈəmōsˌ, lŏs [key], uninc. town (1990 pop. 11,455), seat of Los Alamos co., N central N.Mex. It is on a long mesa extending from the Jemez Mts. The U.S. government chose the sit...