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city-state

(Encyclopedia)city-state, in ancient Greece, Italy, and Medieval Europe, an independent political unit consisting of a city and surrounding countryside. The first city-states were in Sumer, but they reached their p...

Eskimo-Aleut

(Encyclopedia)Eskimo-Aleut, family of Native American languages consisting of Aleut (spoken on the Aleutian Islands and the Kodiak Peninsula) and Eskimo or Inuktitut (spoken in Alaska, Canada, Greenland, and Siberi...

Smith, Kiki

(Encyclopedia)Smith, Kiki, 1954–, American sculptor and printmaker, b. Nuremberg, Germany. The daughter of sculptor Tony Smith, she grew up in New Jersey and settled in New York City in 1976. Prolific and essenti...

radical, in chemistry

(Encyclopedia)radical, in chemistry, group of atoms that are joined together in some particular spatial structure and that take part in most chemical reactions as a single unit. Important inorganic radicals include...

Northumberland

(Encyclopedia)Northumberland nôrthŭmˈbərlənd [key], county (1991 pop. 300,600), 2,019 sq mi (5,229 sq km), NE England; administratively, Northumberland is a unitary authority (since 2009). Northernmost of the ...

supersymmetry

(Encyclopedia)supersymmetry, in physics, theory concerning the relationship of the elementary particles called boson to those known as fermions, and vice versa, and linking the four fundamental forces. In supersymm...

cabildo

(Encyclopedia)cabildo käbēlˈdō [key], autonomous municipal council, the lowest administrative unit in the Spanish government. The institution was especially influential in Spanish America, where it was set up i...

vendetta

(Encyclopedia)vendetta vĕndĕtˈə [key] [Ital.,=vengeance], feud between members of two kinship groups to avenge a wrong done to a relative. Although the term originated in Corsica, the custom has also been pract...

power, electric

(Encyclopedia)power, electric, energy dissipated in an electrical or electronic circuit or device per unit of time. The electrical energy supplied by a current to an appliance enables it to do work or provide some ...

Toltec

(Encyclopedia)Toltec tŏlˈtĕk [key], ancient civilization of Mexico. The name in Nahuatl means “master builders.” The Toltec formed a warrior aristocracy that gained ascendancy in the Valley of Mexico c.a.d. ...