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enthalpy

(Encyclopedia)enthalpy ĕnˈthălpē [key], measure of the heat content of a chemical or physical system; it is a quantity derived from the heat and work relations studied in thermodynamics. As a system changes fro...

sunburn

(Encyclopedia)sunburn, inflammation of the skin caused by actinic rays from the sun or artificial sources. Moderate exposure to ultraviolet radiation is followed by a red blush, but severe exposure may result in bl...

prison

(Encyclopedia)prison, place of confinement for the punishment and rehabilitation of criminals. By the end of the 18th cent. imprisonment was the chief mode of punishment for all but capital crimes. At that time, la...

catalyst

(Encyclopedia)catalyst, substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis...

Mercosur

(Encyclopedia)Mercosur or Mercosul, officially the Common Market of the South, Latin American trade organization established in 1991 to increase economic cooperation among the countries of E South America. It is co...

Cooperative State Research, Education, and Extension Service

(Encyclopedia)Cooperative State Research, Education, and Extension Service, agency within the U.S. Dept. of Agriculture, created (1995) as a result of the reorganization act passed (1994) by Congress. The agency co...

excess profits tax

(Encyclopedia)excess profits tax, levy on any profit above a standard level. Chiefly a wartime phenomenon, it is intended to increase revenue during periods of distress and to prevent businessmen from taking unfair...

trichomoniasis

(Encyclopedia)trichomoniasis trĭkˌəmənīˈəsĭs [key], sexually transmitted disease caused by the parasitic protozoan Trichomonas vaginalis. In women, it can cause urinary tract infection and a painful, malodo...

pressure-treated wood

(Encyclopedia)pressure-treated wood, wood that has had a liquid preservative forced into it in order to protect against deterioration due to rot or insect attack. The most commonly used preservatives are chromated ...

profit sharing

(Encyclopedia)profit sharing, arrangement by which employees receive, in addition to their wages, a share of the net profits of a business. The purpose is to give them an incentive to increase their output through ...