Columbia Encyclopedia
Search results
336 results found
epoxy resins
(Encyclopedia)epoxy resins, group of synthetic resins used to make plastics and adhesives. These materials are noted for their versatility, but their relatively high cost has limited their use. High resistance to c...elevation
(Encyclopedia)elevation, vertical distance from a datum plane, usually mean sea level to a point above the earth. Often used synonymously with altitude, elevation is the height on the earth's surface and altitude, ...polyolefins
(Encyclopedia)polyolefins pŏlˌēōlˈəfən [key], group of plastics that are polymers of various alkenes, or olefins. The most important are polyethylene and polypropylene. ...shield, armor
(Encyclopedia)shield, piece of defensive armor, worn on the arm or shoulder to ward off weapons during combat, used prior to the dominance of gunpowder. Originally for individual defense during hand-to-hand combat,...Gurugram
(Encyclopedia)Gurugram, formerly Gurgaon gûrˈgoun [key], city, Haryana state, N India, 15 mi (24 km) ...melamine
(Encyclopedia)melamine mĕlˈəmēnˌ [key], common name for 2,4,6-triamino-1,3,5-triazine. Melamine is a trimer (see polymer) of cyanamide, H2NC≡N, and is synthesized from calcium carbide. It condenses with form...New Bern
(Encyclopedia)New Bern, city (1990 pop. 17,363), seat of Craven co., E N.C., a port and trading center at the junction of the Neuse and Trent rivers; inc. 1723. There is lumbering and food processing, and textiles ...Youngstown
(Encyclopedia)Youngstown, city (1990 pop. 95,732), seat of Mahoning co., NE Ohio, near the Pa. line; founded 1797, inc. 1849. It was formerly a major U.S. iron and steel center. In the 1970s many of the steel mills...castor oil
(Encyclopedia)castor oil, yellowish oil obtained from the seed of the castor bean. The oil content of the seeds varies from about 20% to 50%. After the hulls are removed the seeds are cold-pressed. Medicinal castor...Northampton, city, United States
(Encyclopedia)Northampton nôrthˌhămpˈtən, nôrˌthămpˈtən [key], city (1990 pop. 29,289), seat of Hampshire co., W Mass., on the Connecticut River; inc. as a town 1656, as a city 1883. Brushes, wire, optica...Browse by Subject
- Earth and the Environment +-
- History +-
- Literature and the Arts +-
- Medicine +-
- People +-
- Philosophy and Religion +-
-
Places
+-
- Africa
- Asia
- Australia and Oceania
- Britain, Ireland, France, and the Low Countries
- Commonwealth of Independent States and the Baltic Nations
- Germany, Scandinavia, and Central Europe
- Latin America and the Caribbean
- Oceans, Continents, and Polar Regions
- Spain, Portugal, Italy, Greece, and the Balkans
- United States, Canada, and Greenland
- Plants and Animals +-
- Science and Technology +-
- Social Sciences and the Law +-
- Sports and Everyday Life +-
