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graining

(Encyclopedia)graining, process of painting by which natural wood grain is imitated. It was common practice in the late 19th cent. to grain cheap, soft woods to give them the appearance of rare, expensive ones. A l...

glaze, in pottery

(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...

Pánuco

(Encyclopedia)Pánuco päˈno͞okō [key], river, c.315 mi (510 km) long, rising as the Santa María River in San Luis Potosí state, N central Mexico, and flowing generally east to empty into the Gulf of Mexico ne...

Leeuwarden

(Encyclopedia)Leeuwarden lāˈvärˌdən [key], Frisian Ljouwert, city (1994 est. pop. 87,500), capital of Friesland prov., N Netherlands. It is the center of an agricultural and dairying region and has a noted cat...

tissue culture

(Encyclopedia)tissue culture, the propagation of plants through the placement of small amounts of undifferentiated tissue or single cells in an artificial environment. The tissue is placed in a nutrient medium that...

Theocritus

(Encyclopedia)Theocritus thēŏkˈrĭtəs [key], fl. c.270 b.c., Hellenistic Greek poet, b. Syracuse. The history of the pastoral begins with him, and in him the form seems to have reached its height. His poetic st...

Chaudière Falls

(Encyclopedia)Chaudière Falls, in the Ottawa River in the heart of the city of Ottawa, Ont., Canada. The river is narrowed by rocky cliffs to a width of c.200 ft (60 m) and drops 50 ft (15 m) in a series of cascad...

Bad Nauheim

(Encyclopedia)Bad Nauheim bät nouˈhīm [key], town, Hesse, central Germany, in the Taunus Mts. It is a wo...

coronary artery disease

(Encyclopedia)coronary artery disease, condition that results when the coronary arteries are narrowed or occluded, most commonly by atherosclerotic deposits of fibrous and fatty tissue. Coronary artery disease is t...

National Aeronautics and Space Administration

(Encyclopedia)National Aeronautics and Space Administration (NASA), civilian agency of the U.S. federal government with the mission of conducting research and developing operational programs in the areas of space e...