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calcite

(Encyclopedia)calcite kălˈsīt [key], very widely distributed mineral, commonly white or colorless, but appearing in a great variety of colors owing to impurities. Chemically it is calcium carbonate, CaCO3, but i...

carpentry

(Encyclopedia)carpentry, trade concerned with constructing wood buildings, the wooden portions of buildings, or the temporary timberwork used during the construction of buildings. It comprises the larger and more s...

Tasaday

(Encyclopedia)Tasaday, alleged band of 25 hunter-gatherers living in the Philippine rain forest, purportedly contacted by Westerners for the first time in 1971 in southern Mindanao (Cotabato Province). They reporte...

windmill

(Encyclopedia)windmill, apparatus that harnesses wind power for a variety of uses, e.g., pumping water, grinding corn, driving small sawmills, and driving electrical generators. Windmills were probably not known in...

Van Doren, Mark

(Encyclopedia)Van Doren, Mark 1894–1973, American poet and critic, b. Hope, Vermilion co., Ill., Ph.D. Columbia, 1920; brother of Carl Van Doren. He taught English at Columbia (1920–59), where he was a renowned...

Washington Monument

(Encyclopedia)Washington Monument, obelisk-shaped tower, 555 ft 51⁄9 in. (169.3 m) high, located on a 106-acre (43-hectare) site at the west end of the Mall, Washington, D.C.; dedicated 1885. The world's tallest ...

Uttar Pradesh

(Encyclopedia)Uttar Pradesh o͝oˈtär präˈdĭsh [key], state (2001 provisional pop. 166,052,859), 92,804 sq mi (240,363 sq km), N central India. The capital is Lucknow. Other important cities are Prayagraj (form...

Wends

(Encyclopedia)Wends or Sorbs, Slavic people (numbering about 60,000) of Brandenburg and Saxony, E Germany, in Lusatia. They speak Lusatian (also known as Sorbic or Wendish), a West Slavic language with two main dia...

Tiahuanaco

(Encyclopedia)Tiahuanaco tyäwänäˈkō [key], ancient native ruin, W Bolivia, 34 mi (55 km) S of Lake Titicaca on the Tiahuanaco R. in the S central Andes, near the Peruvian border; also called Tiwanaku or Tiahua...

quartz

(Encyclopedia)quartz, one of the commonest of all rock-forming minerals and one of the most important constituents of the earth's crust. Chemically, it is silicon dioxide, SiO2. It occurs in crystals of the hexagon...