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Drugs and diseases reference index

Drugs and diseases reference index
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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «N»:

  1. Nitrogen Nitrogen
    Nitrogen: Element number 7, a colorless, odorless, tasteless gas that is biologically important. Nitrogen is a constituent of protein and nucleic acids and is present in all living cells. Nitrogen does not support respiration and is fatal if breathed alone, because of the lack of oxygen. Nitrogen is...
  2. Nitrogen narcosis Nitrogen narcosis
    Nitrogen narcosis: A condition similar to intoxication with alcohol with euphoria, loss of balance and manual dexterity, disorientation and impaired reasoning that occurs in divers below 100 feet (30 meters) who breath compressed air because of the high nitrogen content of air. Nitrogen narcosis is ...
  3. Nitrogen, liquid Nitrogen, liquid
    Nitrogen, liquid: See: Liquid nitrogen....
  4. Nitrogenous base Nitrogenous base
    Nitrogenous base: A molecule that contains nitrogen and has the chemical properties of a base. The nitrogenous bases in DNA are adenine (A), guanine (G), thymine (T), and cytosine (C). The nitrogenous bases in RNA are the same with one exception: adenine (A), guanine (G), uracil (U), and cytosine...
  5. Nitrosoureas Nitrosoureas
    Nitrosoureas: A group of cancer drugs called alkylating agents because they act by the process of alkylation to inhibit DNA repair. The nitrosoureas can cross the blood-brain barrier and are used to treat brain tumors. The nitrosoureas include carmustine (BCNU), lomustine (CCNU) and semustine....
  6. Nitrous oxide (laughing gas) Nitrous oxide (laughing gas)
    Nitrous oxide (laughing gas): A gas that can cause general anesthesia. Nitrous oxide is sometimes given in the company of other anesthetic agents but it is not used today as the only anesthetic agent because the concentration of nitrous oxide needed to produce anesthesia is close to the concentratio...
  7. NK cell NK cell
    NK cell: See Natural killer cell....
  8. NLD NLD
    NLD: Necrobiosis lipoidica diabeticorum....
  9. NLM (National Library of Medicine) NLM (National Library of Medicine)
    NLM (National Library of Medicine): The world's largest medical library, the U.S. National Library of Medicine (NLM) is part of the National Institutes of Health (NIH). The NLM has as its mission to collect, organize, and make available biomedical science information to investigators, educators...
  10. NMR NMR
    NMR: Nuclear Magnetic Resonance. An imaging technique that does not use radiation. ...
  11. No show No show
    No show: Term used in the US for a patient who missed an appointment. (In the UK, a patient who failed an appointment "did not attend." This is abbreviated DNA, not to be confused with the genetic material.)...
  12. Nocardia infection Nocardia infection
    Nocardia infection: Also called nocardiosis, infection with bacteria called Nocardia which tend to strike the lungs, brain and skin, particularly in people with an impaired immune system. The majority (about 80%) of cases of nocardiosis involves lung infection, brain abscess, or disseminated (widesp...
  13. Nocardiosis Nocardiosis
    Nocardiosis: An infection with bacteria called Nocardia which tend to strike the lungs, brain and skin, particularly in people with an impaired immune system. The majority (about 80%) of cases of nocardiosis involves lung infection, brain abscess, or disseminated (widespread) disease from Nocardia. ...
  14. Nocebo Nocebo
    Nocebo: A negative placebo effect as, for example, when patients taking medications experience adverse side effects unrelated to the specific pharmacological action of the drug. The nocebo effect is associated with the person's prior expectations of adverse effects from treatment as well as with con...
  15. Nocturia Nocturia
    Nocturia: Excessive urinating at night. People with nocturia must get up, often two times or more, during the night to urinate. Normally, urine is more concentrated at night and is produced in lower amounts, so that uninterrupted sleep is possible. However, excess urine production at night can occur...