oil-bearing contour
31Europe, history of — Introduction history of European peoples and cultures from prehistoric times to the present. Europe is a more ambiguous term than most geographic expressions. Its etymology is doubtful, as is the physical extent of the area it designates.… …
32Water pollution — Raw sewage and industrial waste flows across international borders New River passes from Mexicali to Calexico, California. Water pollution is the contamination of water bodies (e.g. lakes, rivers, oceans and groundwater). Water p …
33Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …
34coloration — colorational, adj. colorationally, adv. /kul euh ray sheuhn/, n. appearance with regard to color arrangement or use of colors; coloring: the bold coloration of some birds. [1605 15; COLOR + ATION] * * * ▪ biology Introduction in biology,… …
35Lake Baikal — Baykal and Baikal redirect here. For other uses, see Baykal (disambiguation). Lake Baikal Coordinates …
36photoengraving — /foh toh en gray ving/, n. 1. a photographic process of preparing printing plates for letterpress printing. 2. a plate so produced. 3. a print made from it. [1870 75; PHOTO + ENGRAVING] * * * Any of several processes for producing printing plates …
37Opel — This article is about the German automobile manufacturer. For other uses, see Opel (disambiguation). Adam Opel AG Type Aktiengesellschaft Industry Automotive …
38Roller chain — [ frame|right|Roller chain and sprocket] Roller chain or bush roller chain is the type of chain most commonly used for transmission of mechanical power on bicycles, motorcycles, and in industrial and agricultural machinery. It is simple, reliable …
39Ferdinand Alexander Porsche — (born December 11, 1935 [cite web|title=70. születésnapját ünnepli Ferdinand Alexander Porsche|language=Hungarian|work=M1 (Hungarian State Television)|url=http://www.mtv.hu/modernkepmesek/cikk.php?id=81225|date=2005|accessdate=2008 04 07] , in… …
40Himalayas — Himalayan, adj. /him euh lay euhz, hi mahl yeuhz/, n. the, a mountain range extending about 1500 mi. (2400 km) along the border between India and Tibet. Highest peak, Mt. Everest, 29,028 ft. (8848 m). Also called the Himalaya, Himalaya Mountains …
