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Newcastle disease
Newcastle disease pneumoencephalitis, acute viral disease of domestic poultry. Newcastle disease is characterized by sneezing, coughing, and nervous behavior. Affected birds may show tremors, circling, falling, twisting of the head and neck, or complete paralysis. Mortality reaches 90% in very youn...
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Unabomber
Unabomber or Unabomer , name given by the FBI to the elusive perpetrator of a series of bombings (1975-95) in the United States that killed 3 and wounded 23. The targets were mainly academics in technological disciplines, airline executives, and executives in businesses thought to affect the env...
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intoxication
intoxication condition of body tissue affected by a poisonous substance. Poisonous materials, or toxins, are to be found in heavy metals such as lead and mercury, in drugs, in chemicals such as alcohol and carbon tetrachloride, in gases such as carbon monoxide, and in radioactive materials. Toxins ...
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enkephalin
enkephalin , one of several naturally occurring morphinelike substances ( endorphins ) released from nerve endings of the central nervous system and the adrenal medulla. They act as analgesics and sedatives in the body and appear to affect mood and motivation.
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epidemiology
epidemiology field of medicine concerned with the study of epidemics , outbreaks of disease that affect large numbers of people. Epidemiologists, using sophisticated statistical analyses, field investigations, and complex laboratory techniques, investigate the cause of a disease, its distribution ...
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frostbite
frostbite (chilblains), injury to the tissue caused by exposure to cold, usually affecting the extremities of the body, such as the hands, feet, ears, or nose. Extreme cold causes the small blood vessels in the extremities to constrict. The blood circulates more slowly and stagnation results. Event...
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liniment
liniment liquid preparation rubbed on skin, used to relieve muscular aches and pains. It contains some substance that when rubbed over the affected part causes mild irritation and often brings more blood to the painful part. Most liniments contain camphor, oil of turpentine, oil of wintergreen, or ...
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sarcoma
sarcoma , highly malignant tumor arising in connective- and muscle-cell tissue. It is the result of oncogenes (the cancer causing genes of some viruses) and proto-oncogenes (cancer causing genes in human cells). It may affect bone, cartilage, blood vessels, lymph nodes, and skin. See cancer ; neop...
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snow line
snow line altitude above which or latitude beyond which snow does not melt in summer (usually called the permanent snow line), or, in winter, the line to which snow extends at a given point in time. Factors affecting the location of the snow line are the quantity of snowfall, the steepness of the s...
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diabetes
diabetes or diabetes mellitus , chronic disorder of glucose (sugar) metabolism caused by inadequate production or use of insulin , a hormone produced in specialized cells (beta cells in the islets of Langerhans) in the pancreas that allows the body to use and store glucose. It is a leadin...
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