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Siegen, Ludwig von

(Encyclopedia)Siegen, Ludwig von lo͝otˈvĭkh fən zēˈgən [key], c.1609–1680, German engraver, b. Holland, educated in Germany. He is said to have invented (c.1640) the mezzotint process of engraving. Among h...

red giant

(Encyclopedia)red giant, star that is relatively cool but very luminous because of its great size. All normal stars are expected to pass eventually through a red-giant phase as a consequence of stellar evolution. A...

William the Silent

(Encyclopedia)William the Silent or William of Orange (William I, prince of Orange), 1533–84, Dutch statesman, principal founder of Dutch independence. William married four times. His first wife was Anne of Egm...

Regulator movement

(Encyclopedia)Regulator movement, designation for two groups, one in South Carolina, the other in North Carolina, that tried to effect governmental changes in the 1760s. In South Carolina, the Regulator movement wa...

indicators, acid-base

(Encyclopedia)indicators, acid-base, organic compounds that, in aqueous solution, exhibit color changes indicative of the acidity or basicity of the solution. Common indicators include p-nitrophenol, which is color...

Fort Nassau

(Encyclopedia)Fort Nassau. 1 Built (1614) on Castle Island, in the Hudson River, S of Albany, N.Y. The fort served as a trading post for the Dutch until 1617, when it was destroyed by flood and replaced (1624) by F...

Johannesburg, City of

(Encyclopedia)City of Johannesburg, City of, metropolitan municipality (2011 pop. 4,434,827), Gauteng prov., NE South Africa. Johannesburg is the municipal seat; other communities include Soweto, Roodepoort, Alexan...

bird-of-paradise flower

(Encyclopedia)bird-of-paradise flower, large tropical herb (Strelitzia reginae) of the family Musaceae (banana family), native to S Africa. Its large blue and orange blossom resembles an exotic bird; it is cultivat...

Campbell-Bannerman, Sir Henry

(Encyclopedia)Campbell-Bannerman, Sir Henry, 1836–1908, British statesman. Entering Parliament (1868) as a Liberal, he served as secretary to the admiralty (1882–84), secretary of state for Ireland (1884), and ...

Ossory, Thomas Butler, earl of

(Encyclopedia)Ossory, Thomas Butler, earl of ŏsˈərē [key], 1634–80, Irish nobleman; son of James Butler, 12th earl and 1st duke of Ormonde. Created earl of Ossory in 1662, he was made (1665) lieutenant genera...