Columbia Encyclopedia

(Encyclopedia) skydiving, sport of descending partly by parachute from an airplane or similar craft. Engaged in for both recreational and competitive purposes, skydiving involves three phases of activity: the free f...

(Encyclopedia) wisent vēˈsənt [key], name for the European bison, Bison bonasus. It is a close relative of the American bison, B. bison. Longer legged and less heavily built than its American cousin, the wisent m...

(Encyclopedia) xylene dīˌmĕthəlbĕnˈzēn [key], C6H4(CH3)2, colorless, oily, liquid aromatic hydrocarbon, used extensively as a solvent, obtained from coal tar, wood tar, and sometimes from petroleum. It is a m...

(Encyclopedia) Adams, Will (William Adams), 1564?–1620, first Englishman to visit Japan. As pilot of a Dutch ship searching for gold and trade, he reached Japan in 1600. At first imprisoned and sentenced to death,...

(Encyclopedia) Préval, René Garcia rənāˈ gärsēäˈ prāvälˈ [key] 1943–2017, Haitian political leader, president (1996–2001; 2006–11) of Haiti. Préval's family went into exile (1963) during the Duval...

(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...

(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...

(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...

(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...

(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 +...