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mineral

(Encyclopedia)mineral, inorganic substance occurring in nature, having a characteristic and homogeneous chemical composition, definite physical properties, and, usually, a definite crystalline form. A few of the mi...

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 ...

mirror

(Encyclopedia)mirror, in optics, a reflecting surface that forms an image of an object when light rays coming from that object fall upon it (see reflection). Usually mirrors are made of plate glass, one side of whi...

chemistry

(Encyclopedia)chemistry, branch of science concerned with the properties, composition, and structure of substances and the changes they undergo when they combine or react under specified conditions. Organic chemi...

Hofu

(Encyclopedia)Hofu hōˈfo͞o [key], city, Yamaguchi prefecture, SW Honshu, Japan, on the Suo Sea. It is a ...

germicide

(Encyclopedia)germicide jûrˈmĭsīd [key], chemical substance capable of killing many different types of microorganisms; also called disinfectant. ...

Rocky Hill

(Encyclopedia)Rocky Hill, town (1990 pop. 16,554), Hartford co., central Conn., a suburb of Hartford, on the Connecticut River; settled c.1650, inc. 1843. Chemical coatings and synthetic textiles are made there. Ro...

Ulhasnagar

(Encyclopedia)Ulhasnagar o͞olˈhəsnəgər [key], city (1991 pop. 368,772), Maharashtra state, W central India. It is a residential and industrial suburb of Mumbai, with chemical and textile chemicals. It lies in ...

West Bromwich

(Encyclopedia)West Bromwich brŭmˈĭj, –ĭch, brŏmˈwĭch [key], town, Sandwell borough, W central England. On the site of a 12th-century Benedictine priory, West Bromwich has foundries and engineering and chem...

Shimada

(Encyclopedia)Shimada shĭmäˈdä [key], city (1990 pop. 73,810), Shizuoka prefecture, E central Honshu, Japan, on the Oi River. It is a distribution point for timber and rice and a center for woodworking, chemica...