Drugs Information Online
Drugs and diseases reference index

Drugs and diseases reference index
Search
EN


Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «V»:

  1. Viral hemorrhagic fever Viral hemorrhagic fever
    Viral hemorrhagic fever: A syndrome caused by infection with one of a number of viruses that can cause increased permeability of the blood vessels resulting in bleeding into the skin, internally, or from the mouth or other orifices. The bleeding is usually not life-threatening. Other signs and sympt...
  2. Viral hepatitis Viral hepatitis
    Viral hepatitis: Viral hepatitis is liver inflammation caused by viruses. Specific hepatitis viruses have been labeled A, B, C, D, E, F, and G. While other viruses can also cause hepatitis, their primary target is not the liver....
  3. Viral infection Viral infection
    Viral infection: Infection caused by the presence of a virus in the body. Depending on the virus and the person's state of health, various viruses can infect almost any type of body tissue, from the brain to the skin. Viral infections cannot be treated with antibiotics; in fact, in some cases ...
  4. Viral myocarditis Viral myocarditis
    Viral myocarditis: See: Myocarditis, viral....
  5. Viral particle Viral particle
    Viral particle: See: Virion....
  6. Viremia Viremia
    Viremia: The presence of a virus in the blood. Viremia is analogous to bacteremia (the presence of bacteria in the blood) and parasitemia (the presence of a parasite in the blood). Viremia, bacteremia and parasitemia are all forms of sepsis (bloodstream infection). The term "viremia" was compounded ...
  7. Virginal membrane Virginal membrane
    Virginal membrane: A thin membrane which completely or partially occludes the vaginal opening. This fold of mucous membrane is usually present at birth at the orifice of the vagina. In medicine, it is called the vaginal membrane or the hymen. Hymen is a Greek word meaning "skin" or "membrane." The ...
  8. Virilize Virilize
    Virilize: To cause a female to develop male characteristics such as a deepened voice, an increase in body and facial hair, a decrease in breast size, an enlargement of the clitoris, and "male-pattern" baldness. Background Males produce hormones called androgens that cause them to develop typicall...
  9. Virion Virion
    Virion: A complete virus particle with its DNA or RNA core and protein coat as it exists outside the cell. Also called a viral particle....
  10. Virology Virology
    Virology: The study of viruses....
  11. Virtual colonoscopy Virtual colonoscopy
    Virtual colonoscopy: A method for examining the colon by taking a series of x-rays and then using a computer to reconstruct three-dimensional pictures (a CT scan) of the interior surfaces of the colon from these x-rays. The pictures can be saved, manipulated to better viewing angles, and reviewed af...
  12. Virulence Virulence
    Virulence: The ability of any agent of infection to produce disease. The virulence of a microorganism (such as a bacterium or virus) is a measure of the severity of the disease it is capable of causing. The adjective virulent implies extremely noxious, damaging, deleterious, disease-causing (p...
  13. Virulent Virulent
    Virulent: Extremely noxious, damaging, deleterious, disease-causing (pathogenic). Marked by a rapid, severe, and malignant course. Poisonous, venomous. The virulence of a microorganism is a measure of the severity of the disease it causes. The word "virulent" comes from the Latin "virulentus" fro...
  14. Virus Virus
    Virus: A microorganism smaller than a bacteria, which cannot grow or reproduce apart from a living cell. A virus invades living cells and uses their chemical machinery to keep itself alive and to replicate itself. It may reproduce with fidelity or with errors (mutations)-this ability to mutate i...
  15. Virus, attenuated Virus, attenuated
    Virus, attenuated: To attenuate is to weaken or to make (or become) thin. The word derives from a combination of the Latin prefix "ad-," meaning "to" or "toward," and "tenuis," meaning "thin." The use of "attenuate" in medicine is not new. In the 16th century, eating dried figs was claimed to atten...