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air pollution

(Encyclopedia)air pollution, contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health. The major sources of air pollution are t...

chronic fatigue syndrome

(Encyclopedia)chronic fatigue syndrome (CFS) or myalgic encephalomyelitis (ME), collection of persistent, debilitating symptoms, the most notable of which is severe, lasting fatigue. It is also known as systemic ex...

gene

(Encyclopedia)gene, the structural unit of inheritance in living organisms. A gene is, in essence, a segment of DNA that has a particular purpose, i.e., that codes for (contains the chemical information necessary f...

medicine

(Encyclopedia)medicine, the science and art of treating and preventing disease. Modern medicine, characterized by growing specialization and a complex diagnostic and therapeutic technology, faces problems in the...

genetic engineering

(Encyclopedia)CE5 Genetic engineering: Gene-splicing techniques genetic engineering, the use of various methods to manipulate the DNA (genetic material) of cells to change hereditary traits or produce biologica...

alcoholism

(Encyclopedia)alcoholism, 04/00 disease characterized by impaired control over the consumption of alcoholic beverages. Alcoholism is a serious problem worldwide; in the United States the wide availability of alcoho...

Mitterrand, François Maurice

(Encyclopedia)Mitterrand, François Maurice fräNswäˈ mōrēsˈ mētəräNˈ [key], 1916–96, French political leader, president of France, 1981–95. Initially a supporter of Pétain's Vichy government during W...

transplantation, medical

(Encyclopedia)transplantation, medical, surgical procedure by which a tissue or organ is removed and replaced by a corresponding part, usually from another part of the body or from another individual. A life-saving...

vaccination

(Encyclopedia)vaccination, means of producing immunity against pathogens, such as viruses and bacteria, by the introduction of an killed or weakened microorganism, a harmless piece of a microorganism, or the like t...

Thomas Aquinas, Saint

(Encyclopedia)Thomas Aquinas, Saint əkwīˈnəs [key] [Lat.,=from Aquino], 1225–74, Italian philosopher and theologian, Doctor of the Church, known as the Angelic Doctor, b. Rocca Secca (near Naples). He is the ...