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trade association

(Encyclopedia)trade association, group of business people in the same trade or industry organized for the advancement of common interests. The trade association differs from the chamber of commerce in that membersh...

trade rat

(Encyclopedia)trade rat: see pack rat.

trade union

(Encyclopedia)trade union: see union, labor.

trade winds

(Encyclopedia)trade winds, movement of air toward the equator, from the NE in the Northern Hemisphere and from the SE in the Southern Hemisphere. The trade winds originate on the equatorial sides of the horse latit...

free association

(Encyclopedia)free association: see association; psychoanalysis. ...

free energy

(Encyclopedia)free energy or Gibbs free energy, quantity derived from the relationships between heat and work studied in thermodynamics and used as a measure of the relative stability of a physical or chemical syst...

free fall

(Encyclopedia)free fall, in physics, the state of a body moving solely under the influence of gravitational forces (see gravitation). A body falling freely toward the surface of the earth undergoes an acceleration ...

free radical

(Encyclopedia)free radical, in chemistry, a molecule or atom that contains an unpaired electron but is neither positively nor negatively charged. Free radicals are usually highly reactive and unstable. They are pro...

free silver

(Encyclopedia)free silver, in U.S. history, term designating the political movement for the unlimited coinage of silver. In 1896 free silver became the major issue of a presidential campaign when William Jennings...

Free State

(Encyclopedia)Free State, formerly Orange Free State, province, 50,126 sq mi (129,825 sq km), E central South Africa. It was renamed Free State shortly after the 1994...