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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 ...

abrasive

(Encyclopedia)abrasive, material used to grind, smooth, cut, or polish another substance. Natural abrasives include sand, pumice, corundum, and ground quartz. Carborundum (silicon carbide) and alumina (aluminum oxi...

Gris, Juan

(Encyclopedia)Gris, Juan hwän grēs [key], 1887–1927, Spanish cubist painter, whose original name was José Victoriano González. After studying in Madrid he settled in Paris in 1906, where he held his first exh...

acetaldehyde

(Encyclopedia)acetaldehyde ĕthˈənălˌ [key], CH3CHO, colorless liquid aldehyde, sometimes simply called aldehyde. It melts at −123℃, boils at 20.8℃, and is soluble in water and ethanol. It is formed by th...

Miyake, Issey

(Encyclopedia)Miyake, Issey, 1938–, Japanese fashion designer, b. Hiroshima, grad. Tama Art Univ., Tokyo, 1964. He came to Paris in 1965 and designed for Guy Laroche (1966–68) and Givenchy (1968–69) before mo...

opiate drug

(Encyclopedia)opiate drug, any of a group of drugs derived from opium. Used medicinally to relieve pain and induce sleep, they include codeine, morphine, the morphine derivative heroin, and, formerly, laudanum. Som...

Voronezh

(Encyclopedia)Voronezh Rus. vərôˈnyĭsh [key], city (1989 pop. 887,000), capital of Voronezh region, central European Russia, on the Voronezh River. A river port and a major industrial center in a black-earth ag...

toxic shock syndrome

(Encyclopedia)toxic shock syndrome (TSS). acute, sometimes fatal, disease characterized by high fever, nausea, diarrhea, lethargy, blotchy rash, and sudden drop in blood pressure. It is caused by Staphylococcus aur...

Davangere

(Encyclopedia)Davangere däˈvəng–gĕrĕ [key], city, Karnataka state, SW India. It is on the Bengaluru-Pune ...

Alwar

(Encyclopedia)Alwar ŭlˈvər, –ˈwər [key], city, Rajasthan state, N central India. On the Delhi-Jaipur Road, Alwar is a market for grain, oilseed, cotton, and marble. There are tex...