(Encyclopedia) metabolism, sum of all biochemical processes involved in life. Two subcategories of metabolism are anabolism, the building up of complex organic molecules from simpler precursors, and…
(Encyclopedia) PenelopePenelopepənĕlˈəpē [key], in Greek mythology, wife of Odysseus and the mother of Telemachus. In Homer's Odyssey she is pictured as a chaste and faithful wife. When Odysseus was…
(Encyclopedia) mountain, high land mass projecting conspicuously above its surroundings and usually of limited width at its summit. Although isolated mountains are not unusual, mountains commonly…
(Encyclopedia) city government, political administration of urban areas.
The English tradition of incorporating urban units (cities, boroughs, villages, towns) and allowing them freedom in most local…
(Encyclopedia) Federal Trade Commission (FTC), independent agency of the U.S. government established in 1915 and charged with keeping American business competition free and fair. The FTC has no…
(Encyclopedia) roof, overhead covering of a building with its framework support. Various methods of construction, such as are suited to different climates, have diversified exterior and interior…
(Encyclopedia) friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a…
(Encyclopedia) mimic thrush, common name for members of the Mimidae, a family of exclusively American birds, allied to the wrens and thrushes, that includes the mockingbird, the catbird, and the…
(Encyclopedia) motorcycle, motor vehicle whose design is based on the bicycle. The German inventor Gottlieb Daimler is generally credited with building the first practical motorcycle in 1885. The…
(Encyclopedia) boycott, concerted economic or social ostracism of an individual, group, or nation to express disapproval or coerce change. The practice was named (1880) after Capt. Charles Cunningham…
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