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Winston-Salem

(Encyclopedia)Winston-Salem, city (1990 pop. 143,485), seat of Forsyth co., central N.C., in the Piedmont; inc. 1913. It is one of North Carolina's largest cities and foremost industrial centers. Historically a maj...

silicon

(Encyclopedia)silicon, nonmetallic chemical element; symbol Si; at. no. 14; interval in which at. wt. ranges 28.084–28.086; m.p. 1,410℃; b.p. 2,355℃; sp. gr. 2.33 at 25℃; valence usually +4. Silicon is the ...

Mostar

(Encyclopedia)Mostar môˈstär [key], city (2013 pop. 65,286), in Bosnia and Herzegovina, on the Neretva River. Its name means “Old Bridge,” referring to the 16th-century stone bridge built by Ottoman sultan S...

Saguenay

(Encyclopedia)Saguenay săgˈənā, săgˌənāˈ [key], river, c.125 mi (200 km) long, S Que., Canada. It issues from Lac Saint Jean, or Lake Saint John (c.375 sq mi/970 sq km), in two channels, the Grande Déchar...

The Dalles

(Encyclopedia)The Dalles dălz [key], city (1990 pop. 11,060), seat of Wasco co., N Oreg., on the Columbia River; inc. 1857. It is a busy inland port; ships passing through the locks at Bonneville Dam (c.50 mi/80 k...

corundum

(Encyclopedia)corundum kərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal system and in mass...

Cotonou

(Encyclopedia)Cotonou kōtōno͞oˈ [key], city, capital of Atlantique prov., S Benin, on the Gulf of Guinea. ...

sodium hydroxide

(Encyclopedia)sodium hydroxide, chemical compound, NaOH, a white crystalline substance that readily absorbs carbon dioxide and moisture from the air. It is very soluble in water, alcohol, and glycerin. It is a caus...

Bolzano

(Encyclopedia)Bolzano bōˈtsən [key], city, capital of Bolzano prov., in Trentino–Alto Adige, N Italy, ...

lithium

(Encyclopedia)lithium lĭthˈēəm [key] [Gr.,=stone], metallic chemical element; symbol Li; at. no. 3; interval in which at. wt. ranges 6.938–6.997; m.p. about 180.54℃; b.p. about 1,342℃; sp. gr. .534 at 20�...