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Brown, John, American abolitionist

(Encyclopedia)Brown, John, 1800–1859, American abolitionist, b. Torrington, Conn. He spent his boyhood in Ohio. Before he became prominent in the 1850s, his life ha...

bin Laden, Osama

(Encyclopedia)bin Laden, Osama or Usama ōsäˈmə bĭn lädˈən, ŭsäˈmə [key], 1957?–2011, Saudi-born leader of Al Qaeda, a terrorist organization devoted to uniting all Muslims and establishing a transnati...

silverwork

(Encyclopedia)silverwork, utilitarian objects and works of art created from silver. Silverwork includes ecclesiastical and domestic plate, flatware, jewelry, buttons, buckles, boxes, toilet articles, weapons, furni...

pottery

(Encyclopedia)pottery, the baked-clay wares of the entire ceramics field. For a description of the nature of the material, see clay. American art pottery flourished in the first half of the 20th cent., with wor...

explosive

(Encyclopedia)explosive, substance that undergoes decomposition or combustion with great rapidity, evolving much heat and producing a large volume of gas. The reaction products fill a much greater volume than that ...

funeral customs

(Encyclopedia)funeral customs, rituals surrounding the death of a human being and the subsequent disposition of the corpse. Such rites may serve to mark the passage of a person from life into death, to secure the w...

microscope

(Encyclopedia)CE5 Compound microscope microscope, optical instrument used to increase the apparent size of an object. The electron microscope, which is not limited by the powers of optical lenses and light,...

mosaic

(Encyclopedia)mosaic mōzāˈĭk [key], art of arranging colored pieces of marble, glass, tile, wood, or other material to produce a surface ornament. The Gothic revival of the 19th cent. produced some modern ...

lubrication

(Encyclopedia)lubrication, introduction of a substance between the contact surfaces of moving parts to reduce friction and to dissipate heat. A lubricant may be oil, grease, graphite, or any substance—gas, liquid...

totalitarianism

(Encyclopedia)totalitarianism tōtălˌĭtârˈēənĭzəm [key], a modern autocratic government in which the state involves itself in all facets of society, including the daily life of its citizens. A totalitarian...