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field, in algebra

(Encyclopedia)field, in algebra, set of elements (usually numbers) that may be combined under the operations of addition and multiplication so that it constitutes an additive group, the nonzero elements form a mult...

field, in physics

(Encyclopedia)field, in physics, region throughout which a force may be exerted; examples are the gravitational, electric, and magnetic fields that surround, respectively, masses, electric charges, and magnets. The...

field-effect transistor

(Encyclopedia)field-effect transistor: see transistor. ...

field-emission microscope

(Encyclopedia)field-emission microscope: see microscope. ...

field-ion microscope

(Encyclopedia)field-ion microscope: see microscope. ...

quantum field theory

(Encyclopedia)quantum field theory, study of the quantum mechanical interaction of elementary particles and fields. Quantum field theory applied to the understanding of electromagnetism is called quantum electrodyn...

Grady, Henry Woodfin

(Encyclopedia)Grady, Henry Woodfin, 1850–89, American journalist and orator, b. Athens, Ga. In 1879 a gift from Cyrus W. Field enabled him to buy into the Atlanta Constitution. He gained fame with his editorials ...

North West

(Encyclopedia)North West, province (2011 pop. 3,509,953), 40,495 sq mi (104,882 sq km), N central South Africa. In 1994, under South Africa's post-apartheid constitution, North West was created from parts of the fo...

Key West

(Encyclopedia)Key West, city (1990 pop. 24,832), seat of Monroe co., S Fla., on an island at the southwestern extremity of the Florida Keys; inc. 1828. About 150 mi (240 km) from Miami (but only 90 mi/145 km from C...

Middle West

(Encyclopedia)Middle West: see Midwest.