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poison

(Encyclopedia)poison, any agent that may produce chemically an injurious or deadly effect when introduced into the body in sufficient quantity. Some poisons can be deadly in minute quantities, others only if relati...

nephrosis

(Encyclopedia)nephrosis nəfrōˈsəs [key], kidney disease characterized by lesions of the epithelial lining of the renal tubules, resulting in marked disturbance in the filtration function and the consequent appe...

Q fever

(Encyclopedia)Q fever, disease caused by Coxiella burnetii, a small, Gram-negative bacterium. The bacterium infects livestock (cattle, goats, and sheep) and other domesticated animals, and is found in the urine, fe...

mental retardation

(Encyclopedia)mental retardation, below average level of intellectual functioning, usually defined by an IQ of below 70 to 75, combined with limitations in the skills necessary for daily living. Daily living skills...

beriberi

(Encyclopedia)beriberi bĕrˈēbĕrˈē [key], deficiency disease occurring when the human body has insufficient amounts of thiamine (vitamin B1). The deficiency may result from improper diet (e.g., ingestion of hi...

Guinea, archaic term for Africa's west coast

(Encyclopedia)Guinea gĭnˈē [key], an archaic term for the west coast of Africa. In its widest sense it has been applied to the region from Angola to Senegal. Parts of the region bore names originating in early c...

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