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  • PAH

    Polycyclic aromatic hydrocarbon.

  • Fever, quintan

    Fever, quintan: Quintan means recurring every 5 days, the characteristic duration of trench fever. Quintan or trench fever is a disease borne by body lice that was first recognized in the trenches of World War I, when it is estimated to have affected more than a million people in Russia and on the fronts in […]

  • Dizziness


  • Plague

    The plague is an infectious disease due to a bacteria called Yersinia pestis. Y. pestis mainly infects rats and other rodents. Rodents are the prime reservoir for the bacteria. Fleas function as the prime vectors carrying the bacteria from one species to another. The fleas bite the rodents infected with Y. pestis and then they […]

  • Thrombosis, deep vein (DVT)

    Blood clotting in the veins of the inner thigh or leg. In air travel, deep vein thrombosis is the “economy-class syndrome.” deep vein thrombosis can be associated with any state of relative immobility, including prolonged sitting, following surgery, or with illness. Some deep vein thrombosis are associated with familial syndromes. Blood clots can break off […]

  • Ascites

    An abnormal accumulation of fluid within the abdomen. There are many causes of ascites, including cirrhosis of the liver, cancer within the abdomen, congestive heart failure, and tuberculosis.

  • Squamous cell carcinoma

    Cancer that begins in squamous cells — thin, flat cells that look under the microscope like fish scales. Squamous cells are found in the tissue that forms the surface of the skin, the lining of hollow organs of the body, and the passages of the respiratory and digestive tracts. Squamous cell carcinomas may arise in […]

  • Engagement

    Engagement: The sensation that a pregnant woman feels when the lowermost part of the fetus descends and is engaged in the mother’s pelvis, an event that typically occurs 2 to 3 weeks before labor begins. Women who have had two or more prior viable pregnancies (multiparas) may not experience engagement until labor actually begins. When […]

  • System, sympathetic nervous

    A part of nervous system that accelerates the heart rate, constricts blood vessels, and raises blood pressure. The sympathetic nervous system together with the parasympathetic nervous system (that slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles) constitute the autonomic nervous system.

  • Functional magnetic resonance imaging

    Functional magnetic resonance imaging: The use of magnetic resonance imaging (MRI) to learn which regions of the brain are active in a specific function, as in speech. Abbreviated fMRI. See also: Magnetic resonance imaging