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Las Vegas

(Encyclopedia) Las VegasLas Vegasläs vāˈgəs [key], city (1990 pop. 258,295), seat of Clark co., S Nev.; inc. 1911. It is the largest city in Nevada and the center of one of the fastest-growing urban…

neutron

(Encyclopedia) neutron, uncharged elementary particle of slightly greater mass than the proton. It was discovered by James Chadwick in 1932. The stable isotopes of all elements except hydrogen and…

mucopolysaccharide

(Encyclopedia) mucopolysaccharidemucopolysaccharidemy&oomacr;ˌkəpŏlēsăkˈərīd [key], class of polysaccharide molecules, also known as glycosaminoglycans, composed of amino-sugars chemically linked…

pavement

(Encyclopedia) pavement, the wearing surface of a road, street, or sidewalk. Parts of Babylon and Troy are believed to have been paved; Roman roads were noted for their durable stone paving.…

gender

(Encyclopedia) gender [Lat. genus=kind], in grammar, subclassification of nouns or nounlike words in which the members of the subclass have characteristic features of agreement with other words. The…

How the Planets and Satellites Got Their Names

Source: The U.S. Geological SurveyMERCURY Named for the winged Roman god of travel because it appears to move so swiftly.VENUS Roman name for the goddess of love. This planet was considered…

contract

(Encyclopedia) contract, in law, a promise, enforceable by law, to perform or to refrain from performing some specified act. In a general sense, all civil obligations fall under tort or contract law…