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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...

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...

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...

kinship

(Encyclopedia)kinship, relationship by blood (consanguinity) or marriage (affinity) between persons; also, in anthropology and sociology, a system of rules, based on such relationships, governing descent, inheritan...

Baade, Walter

(Encyclopedia)Baade, Walter välˈtər bäˈdə [key], 1893–1960, German-born American astronomer. From 1919 to 1931 he was on the staff of the Hamburg observatory; from 1931 to 1958, at the Mt. Wilson observator...

wisent

(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...

xylene

(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...

skydiving

(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...

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 +...

Adams, Will

(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,...