Columbia Encyclopedia
Search results
48 results found
Aqtöbe
(Encyclopedia)Aqtöbe or Aktöbe əktyo͞oˈbĭnsk [key], city, NW Kazakhstan, on the Ilek River and the Kazalinsk RR. Aqtöbe has an important ferroalloy plant and chromium comp...Kütahya
(Encyclopedia)Kütahya kütäˈyä [key], city (1990 pop. 131,286), capital of Kütahya prov., W central Turkey. An agricultural market center producing sugar beets, fruit, and cotton. Iron, lignite, mercury, and c...ruby
(Encyclopedia)ruby, precious stone, the transparent red variety of corundum, found chiefly in Myanmar, Thailand, and Sri Lanka and classified among the most valuable of gems. The Myanmarese stones are blood red, th...vanadium
(Encyclopedia)vanadium vənāˈdēəm [key], metallic chemical element; symbol V; at. no. 23; at. wt. 50.9415; m.p. about 1,890℃; b.p. 3,380℃; sp. gr. about 6 at 20℃; valence +2, +3, +4, or +5. Vanadium is a ...Tarsus
(Encyclopedia)Tarsus tärˈsəs, Turk. tärso͝osˈ [key], city (1990 pop. 191,333), S Turkey, in Cilicia, on the Tarsus (anc. Cydnus) River, near the Mediterranean Sea. It is an agricultural trade center; copper, ...garnet
(Encyclopedia)garnet, name applied to a group of isomorphic minerals crystallizing in the cubic system. They are used chiefly as gems and as abrasives (as in garnet paper). The garnets are double silicates; one of ...alizarin
(Encyclopedia)alizarin əlĭzˈərĭn [key], or 1,2-dihydroxyanthraquinone, mordant vegetable dye obtained originally from the root of the madder plant (Rubia tinctorum), in which it occurs as a glucoside. The term...carbide
(Encyclopedia)carbide, any one of a group of compounds that contain carbon and one other element that is either a metal, boron, or silicon. Generally, a carbide is prepared by heating a metal, metal oxide, or metal...alloy
(Encyclopedia)alloy ălˈoi, əloiˈ [key] [O. Fr.,=combine], substance with metallic properties that consists of a metal fused with one or more metals or nonmetals. Alloys may be a homogeneous solid solution, a he...emerald
(Encyclopedia)emerald, the green variety of beryl, of which aquamarine is the blue variety. Chemically, it is a beryllium-aluminum silicate whose color is due to small quantities of chromium compounds. The emerald ...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 +-
