Columbia Encyclopedia

(Encyclopedia) glaze, translucent layer that coats pottery to give the surface a finish or afford a ground for decorative painting. Glazes—transparent, white, or colored—are fired on the clay. Of the various art...

(Encyclopedia) Graf or Graff, Urs o͝ors [key], c.1485–1528, Swiss wood engraver, etcher, painter, and goldsmith, studied at Basel. He was influenced by the work of Dürer and Hans Baldung. One of the first to emp...

(Encyclopedia) frostweed or frostwort, North American woodland flowers (Helianthemum canadense and sometimes other related species) of the family Cistaceae (rockrose family). In cold weather, crystals of ice shoot f...

(Encyclopedia) magnesia, common name for the chemical compound magnesium oxide, MgO. It occurs as colorless, cubic crystals. It is refractory, melting at about 2,800℃. It is very slightly soluble in pure water but...

(Encyclopedia) macadamia măkˌədāˈmēə [key], name for the nut of the Macadamia ternifolia, an evergreen tree native to Australia, but cultivated elsewhere, including Hawaii and South Africa. The small, edible ...

(Encyclopedia) Nevelson, Louise, 1900–1988, American sculptor, b. Kiev, Russia. Using odd pieces of wood, found objects, cast metal and other materials, Nevelson constructed huge walls or enclosed box arrangements...

(Encyclopedia) Ayrshire cattle rˈshēr, –shər [key], breed of dairy cattle originated in Scotland in the late 18th cent.; introduced into the United States in 1837. They are medium-sized and white mixed with red...

(Encyclopedia) marcasite märˈkəsīt [key] or white iron pyrites, a mineral closely resembling and having the same chemical composition (FeS2) as pyrite. It differs from pyrite in that it is paler in color, become...

(Encyclopedia) petunia, any plant of the genus Petunia, South American herbs of the family Solanaceae (nightshade family). The common garden petunias, planted also in window boxes, are all considered hybrids of whit...

(Encyclopedia) pipestone, hard, dull red or mottled pink-and-white clay stone, carved by Native Americans into pipes. Called calumets (see calumet) the pipes were used extensively in ceremonials. Native Americans he...