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fluorescence

(Encyclopedia)fluorescence flo͝orĕsˈəns [key], luminescence in which light of a visible color is emitted from a substance under stimulation or excitation by light or other forms of electromagnetic radiation or ...

Mary II, 1662–94, queen of England

(Encyclopedia)Mary II, 1662–94, queen of England, wife of William III. The daughter of James II by his first wife, Anne Hyde, she was brought up a Protestant despite her father's adoption of Roman Catholicism. In...

Cooper, Samuel

(Encyclopedia)Cooper, Samuel, 1609–72, one of the greatest English miniaturists. A student of Hoskins, he worked in London from c.1642. He painted portraits of numerous celebrated Englishmen. His draftsmanship an...

Magog, in the Bible

(Encyclopedia)Magog māˈgŏg [key], in the Bible. 1 Son of Japheth. 2 The land from which Gog, the eschatological enemy of the people of God, comes to wreak havoc on Israel. ...

San Leandro

(Encyclopedia)San Leandro săn lēănˈdrō [key], city (1990 pop. 68,223), Alameda co., W Calif., on San Francisco Bay; inc. 1872. Metal, wood, and paper products; chemicals; leather goods; foods and beverages; me...

Reign of Terror

(Encyclopedia)Reign of Terror, 1793–94, period of the French Revolution characterized by a wave of executions of presumed enemies of the state. Directed by the Committee of Public Safety, the Revolutionary govern...

seasonal affective disorder

(Encyclopedia)seasonal affective disorder (SAD), recurrent fall or winter depression characterized by excessive sleeping, social withdrawal, depression, overeating, and pronounced weight gain. SAD effects an estima...

hypostyle

(Encyclopedia)hypostyle hĭpˈəstīl, hīˈpə– [key], the chamber in Egyptian temples in which a number of columns supported a flat stone roof. Forming the chief and largest inner space of the temple, it was en...

Orrery, Roger Boyle, 1st earl of

(Encyclopedia)Orrery, Roger Boyle, 1st earl of, 1621–79, Irish statesman and writer; son of Richard Boyle, 1st earl of Cork. Created (1627) Baron Broghill, he studied at Trinity College, Dublin, traveled abroad, ...

liquefied petroleum gas

(Encyclopedia)liquefied petroleum gas or LPG, mixture of gases, chiefly propane and butane, produced commercially from petroleum and stored under pressure to keep it in a liquid state. The boiling point of liquefie...