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Grahamstown

(Encyclopedia)Grahamstown, city, now part and seat of Makana local municipality, Eastern Cape prov., SE South Africa. It manufactures pottery and is the commercial center for a rich agricultural region. Founded in ...

California, Gulf of

(Encyclopedia)California, Gulf of, or Sea of Cortés, arm of the Pacific Ocean, c.700 mi (1,130 km) long and 50 to 130 mi (80–209 km) wide, NW Mexico; separates Baja California from the Mexican mainland. The gulf...

Wicklow, county, Republic of Ireland

(Encyclopedia)Wicklow wĭkˈlō [key], county (1991 pop. 97,265), 782 sq mi (2,025 sq km), E Republic of Ireland. The county seat is Wicklow. The Wicklow Mts. and their foothills occupy almost the entire area of th...

Biafra, Republic of

(Encyclopedia)Biafra, Republic of, secessionist state of W Africa, in existence from May 30, 1967, to Jan. 15, 1970. At the outset Biafra comprised, roughly, the East-Central, South-Eastern, and Rivers states of th...

Wicklow, town, Republic of Ireland

(Encyclopedia)Wicklow, town (1991 pop. 6,215), seat of Co. Wicklow, E Republic of Ireland, on the Irish Sea. It is a seaport and market for an area of potato growing and livestock raising. Chemicals, fertilizers, a...

sphere of influence

(Encyclopedia)sphere of influence, term formerly applied to an area over which an outside power claims hegemony with the intention of subsequently gaining more definite control, as in colonization, or with the inte...

calculus of variations

(Encyclopedia)calculus of variations, branch of mathematics concerned with finding maximum or minimum conditions for a relationship between two or more variables that depends not only on the variables themselves, a...

Eureka

(Encyclopedia)Eureka yo͞orēˈkə [key], port city (2020 pop. 26,512), seat of Humboldt co., NW Calif., on ...

Argyll, Archibald Campbell, 3d duke of

(Encyclopedia)Argyll, Archibald Campbell, 3d duke of, 1682–1761, Scottish nobleman; brother of the 2d duke. As lord high treasurer of Scotland (1705) and a commissioner for the union (1706), he helped negotiate t...

decibel

(Encyclopedia)decibel dĕsˈəbĕlˌ, –bəl [key], abbr. dB, unit used to measure the loudness of sound. It is one tenth of a bel (named for A. G. Bell), but the larger unit is rarely used. The decibel is a measu...