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spurge

(Encyclopedia)CE5 Snow-on-the-mountain, Euphorbia marginata spurge spûrj [key], common name for members of the Euphorbiaceae, a family of herbs, shrubs, and trees of greatly varied structure and almost cosmopo...

coffee

(Encyclopedia)coffee, a tree, its seeds, and the beverage made from them. The coffee tree, a small evergreen of the genus Coffea, has smooth, ovate leaves and clusters of fragrant white flowers that mature into dee...

mass extinction

(Encyclopedia)mass extinction, the extinction of a large percentage of the earth's species, opening ecological niches for other species to fill. There have been at least ten such events. The five greatest were thos...

serf

(Encyclopedia)serf, under feudalism, peasant laborer who can be generally characterized as hereditarily attached to the manor in a state of semibondage, performing the servile duties of the lord (see also manorial ...

terrorism

(Encyclopedia)terrorism, the threat or use of violence, often against the civilian population, to achieve political or social ends, to intimidate opponents, or to publicize grievances. The term dates from the Reign...

Shaw, George Bernard

(Encyclopedia)Shaw, George Bernard, 1856–1950, Irish playwright and critic. He revolutionized the Victorian stage, then dominated by artificial melodramas, by presenting vigorous dramas of ideas. The lengthy pref...

forest

(Encyclopedia)forest, a dense growth of trees, together with other plants, covering a large area of land. The science concerned with the study, preservation, and management of forests is forestry. A forest is an ec...

New Testament

(Encyclopedia)New Testament, the distinctively Christian portion of the Bible, consisting of 27 books of varying lengths dating from the earliest Christian period. The seven epistles whose authorship by St. Paul is...

biblical archaeology

(Encyclopedia)biblical archaeology, term applied to the archaeology of the biblical lands, especially those of the ancient Middle East. While the thousands of written texts found in the languages of the ancient Mid...

nitrogen

(Encyclopedia)nitrogen nīˈtrəjən [key], gaseous chemical element; symbol N; at. no. 7; interval in which at. wt. ranges 14.00643–14.00728; m.p. −209.86℃; b.p. −195.8℃; density 1.25 grams per liter at ...