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convection
(Encyclopedia)convection, mode of heat transfer in fluids (liquids and gases). Convection depends on the fact that, in general, fluids expand when heated and thus undergo a decrease in density (since a given volume...hail, in meteorology
(Encyclopedia)hail, precipitation in the form of pellets composed of ice or of ice and snow, occurring at any time of the year, usually during the passage of a cold front or during a thunderstorm. Small hailstones ...Knights of Saint John of Jerusalem
(Encyclopedia)Knights of Saint John of Jerusalem: see Knights Hospitalers. ...Saint John of Jerusalem, Knights of
(Encyclopedia)Saint John of Jerusalem, Knights of: see Knights Hospitalers. ...Olbers, Heinrich Wilhelm Matthäus
(Encyclopedia)Olbers, Heinrich Wilhelm Matthäus hīnˈrĭkh vĭlˈhĕlm mätĕˈo͝os ôlˈbərs [key], 1758–1840, German astronomer and physician. He originated (1797) the first satisfactory method for calculat...Antonioni, Michelangelo
(Encyclopedia)Antonioni, Michelangelo mëkālänˈjālō äntōnyôˈnē [key], 1912–2007, Italian film director and scriptwriter, b. Ferrara, Italy. In the 1940s he made documentaries that contributed to the dev...Cai Guo-Qiang
(Encyclopedia)Cai Guo-Qiang, 1957–, Chinese painter and a sculptor especially known for using gunpowder as a medium and explosions and fireworks as means of artistic expression, b. Quanzhou, Fujian prov., studied...O'Keeffe, Georgia
(Encyclopedia)O'Keeffe, Georgia ōkēfˈ [key], 1887–1986, American painter, b. Sun Prairie, Wis. After working briefly as a commercial artist in Chicago, O'Keeffe abandoned painting until she began the study of ...Correggio
(Encyclopedia)Correggio kərĕjˈō [key], c.1494–1534, Italian painter, whose real name was Antonio Allegri, called Correggio for his birthplace. He learned the rudiments of art from his uncle Lorenzo Allegri. H...plagues of Egypt
(Encyclopedia)plagues of Egypt, in the Bible, the plagues and other troubles brought on Egypt by God through the hands of Moses, because Pharaoh would not let the people of Israel go out of Egypt. The account, in t...Browse by Subject
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