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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «V»:

  1. Viruses Viruses
    Viruses: Small living particles that can infect cells and change how the cells function. Infection with a virus can cause a person to develop symptoms. The disease and symptoms that are caused depend on the type of virus and the type of cells that are infected....
  2. Viscera Viscera
    Viscera: The internal organs of the body, specifically those within the chest (as the heart or lungs) or abdomen (as the liver, pancreas or intestines). The singular of "viscera" is "viscus" meaning in Latin "an organ of the body."...
  3. Visceral Visceral
    Visceral: Referring to the viscera, the internal organs of the body, specifically those within the chest (as the heart or lungs) or abdomen (as the liver, pancreas or intestines). In a figurative sense, something "visceral" is felt "deep down." It is a "gut feeling."...
  4. Visceral leishmaniasis Visceral leishmaniasis
    Visceral leishmaniasis: A chronic and potentially fatal parasitic disease of the viscera (particularly the liver, spleen, bone marrow and lymph nodes) due to infection by Leishmania donovani. Also known as Kala-azar. Leishmania donovani is transmitted by sandfly bites in parts of Asia (primarily Ind...
  5. Visceral pericardium Visceral pericardium
    Visceral pericardium: The inner layer of the pericardium, a conical sac of fibrous tissue that surrounds the heart and the roots of the great blood vessels. The pericardium has outer and inner coats. The outer coat is tough and thickened, loosely cloaks the heart, and is attached to the central ...
  6. Viscus Viscus
    Viscus: An internal organ of the body, specifically one within the chest (as the heart or lungs) or abdomen (as the liver, pancreas or intestines). "Viscus" is the Latin word for "an organ of the body." The plural of "viscus" is "viscera."...
  7. Vision therapy Vision therapy
    Vision therapy: The use of special eye exercises to address eye defects, such as strabismus. Some vision therapists also claim that eye exercises can help people with neurological or learning disabilities. This approach is not proven for the latter use, although some patients do report improvem...
  8. Vision, binocular Vision, binocular
    Vision, binocular: See: Binocular vision....
  9. Vision, blurred Vision, blurred
    Vision, blurred: See: Blurred vision....
  10. Vision, central Vision, central
    Vision, central: See: Central vision....
  11. Vision, low Vision, low
    Vision, low: Visual loss that cannot be corrected with eyeglasses or contact lenses and that interferes with daily living activities....
  12. Vision, macular Vision, macular
    Vision, macular: The macula is a special area in the center of the retina, the light-sensitive layer of tissue at the back of the eye. As we read, light is focused onto our macula. There, millions of cells change the light into nerve signals that tell the brain what we are seeing. This is called our...
  13. Vision, peripheral Vision, peripheral
    Vision, peripheral: See: Peripheral vision....
  14. Vision, tubular Vision, tubular
    Vision, tubular: See: Tubular vision; Tunnel vision....
  15. Vision, tunnel Vision, tunnel
    Vision, tunnel: See: Tunnel vision....