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Dione, in astronomy

(Encyclopedia)Dione dīōˈnē [key], in astronomy, one of the named moons, or natural satellites, of Saturn. Also known as Saturn IV (or S4), Dione is 695 mi (1,120 km) in diameter, orbits Saturn at a mean distanc...

Mousterian

(Encyclopedia)Mousterian or Levalloiso-Mousterian: see Paleolithic period. ...

Precambrian

(Encyclopedia)Precambrian, name of a major division of geologic time (see Geologic Timescale, tablegeologic timescale, table), from c.5 billion to 570 million years ago. It is now usually divided into the Archean a...

baby boom

(Encyclopedia)baby boom, a period in which the birthrate is significantly higher than in other periods, especially the post–World War II period in the United States, Canada, Australia, and New Zealand. In the Uni...

Gilded Age

(Encyclopedia)Gilded Age, a term used to describe a period in United States history—from roughly 1870 to 1900—when the wealthy elite consisted of industrialists w...

sunspots

(Encyclopedia)sunspots, dark, usually irregularly shaped spots on the sun's surface that are actually solar magnetic storms. The spots are darker because the temperature of the spots is lower than that of the surro...

Gibbs, James

(Encyclopedia)Gibbs, James, 1682–1754, English architect, b. Scotland, studied in Rome under Carlo Fontana. Returning to England in 1709, he was appointed a member of the commission authorized to build 50 churche...

German Catholics

(Encyclopedia)German Catholics, religious groups founded in 1844 by dissidents from the Roman Catholic Church. They were led by two excommunicated priests, Johann Czerski of Schneidemühl, Posen, and Johann Ronge o...

Dio Cassius

(Encyclopedia)Dio Cassius (Cassius Dio Cocceianus) dīo kăshˈəs [key], c.155–235?, Roman historian and administrator, b. Nicaea in Bithynia. He was a grandson of Dio Chrysostom. His rise in civil and military ...

château

(Encyclopedia)château shătōˈ, Fr. shätōˈ [key], royal or seignioral residence and stronghold of medieval France—the counterpart of the English castle of the period. In such a fortress, peasants of the surr...