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Bowles, Samuel

(Encyclopedia)Bowles, Samuel, 1797–1851, American newspaper editor, b. Hartford, Conn. He founded (1824) the Springfield (Mass.) Republican, a weekly. In 1844 it became a daily under the influence of his son, Sam...

aerodynamics

(Encyclopedia)aerodynamics, study of gases in motion. As the principal application of aerodynamics is the design of aircraft, air is the gas with which the science is most concerned. Although aerodynamics is primar...

norovirus

(Encyclopedia)norovirus or Norwalk virus, highly contagious viral disease caused by infection with an RNA virus of the genus Norovirus. The virus causes acute gastroenteritis, usually one to two days after infectio...

Millais, Sir John Everett

(Encyclopedia)Millais, Sir John Everett mĭlāˈ [key], 1829–96, English painter. A prodigy, he began studying at the Royal Academy at the age of 11. In 1848, together with William Holman Hunt and Dante Gabriel R...

mahogany

(Encyclopedia)mahogany, common name for the Meliaceae, a widely distributed family of chiefly tropical shrubs and trees, often having scented wood. The valuable hardwood called mahogany is obtained from many member...

rosewood

(Encyclopedia)rosewood, popular name for the ornamental wood of several species of tropical trees, especially for the heartwood of certain leguminous trees of the genus Dalbergia of the family Leguminosae (pulse fa...

safety lamp

(Encyclopedia)safety lamp, oil lamp designed for safe use in mines and other places where flammable gases such as firedamp (see damp) may be present. Its invention (c.1816) is usually attributed to Sir Humphry Davy...

thallium

(Encyclopedia)thallium thălˈēəm [key], metallic chemical element; symbol Tl; at. no. 81; interval in which at. wt. ranges 204.382–204.385; m.p. 303.5℃; b.p. about 1,457℃; sp. gr. 11.85 at 20℃; valence +...

Schmidt, Helmut

(Encyclopedia)Schmidt, Helmut hĕlˈmo͝ot shmĭt [key], 1918–2015, German political leader, chancellor of West Germany (1974–82). After serving in World War II, he entered politics and joined the Social Democr...

Sedna

(Encyclopedia)Sedna, in astronomy, the most distant known large object in the solar system. With a highly eccentric elliptical orbit that ranges from an estimated 76 AU to 937 AU, Sedna also has an extremely long o...