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Girnar

(Encyclopedia)Girnar gĭrnärˈ [key], sacred mountain, 3,666 ft (1,117 m) high, Gujarat state, W India, on the Kathiawar Peninsula; a pilgrimage place for adherents of Jainism. It has five peaks, the sides of whic...

Athabasca

(Encyclopedia)Athabasca ăthəbăsˈkə [key], river, 765 mi (1,231 km) long, rising in the Columbia snowfield of the Canadian Rockies near the Alta.–British Columbia line and flowing N through Jasper National Pa...

aegis

(Encyclopedia)aegis ēˈjĭs [key], in Greek mythology, weapon of Zeus and Athena. It possessed the power to terrify and disperse the enemy or to protect friends. The aegis was usually described as a garment made o...

Queen Elizabeth Islands

(Encyclopedia)Queen Elizabeth Islands, northern part of the Arctic Archipelago, Northwest Territories and Nunavut, N Canada. Ellesmere Island (the largest), the Parry group (Melville, Bathurst, Devon, Prince Patric...

sting

(Encyclopedia)sting, in zoology, organ found in bees, many wasps, some ants, and in scorpions and sting rays, used defensively as well as to kill or paralyze prey. In the bee and the wasp the venom is produced by g...

lubrication

(Encyclopedia)lubrication, introduction of a substance between the contact surfaces of moving parts to reduce friction and to dissipate heat. A lubricant may be oil, grease, graphite, or any substance—gas, liquid...

flotation process

(Encyclopedia)flotation process, in mineral treatment and mining, process for concentrating the metal-bearing mineral in an ore. Crude ore is ground to a fine powder and mixed with water, frothing reagents, and col...

Klein, Calvin Richard

(Encyclopedia)Klein, Calvin Richard klīn [key], 1942–, American fashion designer, b. New York City. In 1968 he established Calvin Klein Limited, which produced clothes and accessories bearing his hallmark of sim...

cassiterite

(Encyclopedia)cassiterite kəsĭtˈərīt [key], heavy, brown-to-black mineral, tin oxide, SnO2, crystallizing in the tetragonal system. It is found as short prismatic crystals and as irregular masses, usually in v...

cattail

(Encyclopedia)cattail or reed mace, any plant of the genus Typha, perennial herbs found in almost all open marshes. The cattail (also called club rush) has long narrow leaves, sometimes used for weaving chair seats...