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 - «N»:

  1. Needle stick Needle stick
    Needle stick: See: Needlestick injury....
  2. Needlestick injury Needlestick injury
    Needlestick injury: A penetrating stab wound from a needle (or other sharp object) that may result in exposure to blood or other body fluids. The main concern is exposure to the blood or other body fluids of another person who may be carrying infectious disease. The pathogens of primary concern are ...
  3. Nef gene Nef gene
    Nef gene: Short for negative factor gene, a gene the absence (or defect) of which diminishes the strength of a disease. The term Nef gene was coined in 1989 in respect to HIV (the human immunodeficiency virus) and AIDS. The Nef gene in this situation is a gene in HIV the absence (or defect) of whi...
  4. Negative calorie diet Negative calorie diet
    Negative calorie diet: The Negative calorie diet is a weight loss concept based upon the premise that consumption of foods with a "negative caloric effect" (meaning that the calories burned by chewing, digesting, and eliminating the food are greater than those contained in the food itself) will...
  5. Negative clinical trial Negative clinical trial
    Negative clinical trial: A clinical trial that shows that a new treatment is inferior to standard treatment. See: Clinical trials. See also: Inconclusive clinical trial; Non-inferior clinical trial; Positive clinical trial....
  6. Negative, false Negative, false
    Negative, false: A result that appears negative but fails to reveal a situation. An example of a false negative: a particular test designed to detect cancer of the toenail is negative but the person has toenail cancer....
  7. Negative-strand RNA virus Negative-strand RNA virus
    Negative-strand RNA virus: Also known as an antisense-strand RNA virus, a virus whose genetic information consists of a single strand of RNA that is the negative or antisense strand which does not encode mRNA (messenger RNA). Examples of negative-strand RNA viruses include influenza virus, measles v...
  8. Neglect, child Neglect, child
    Neglect, child: Child neglect is the most frequently reported form of child abuse (60% of all cases) and the most lethal. Child neglect is the failure to provide for the shelter, safety, supervision and nutritional needs of the child. Child neglect may be physical, educational, or emotional negle...
  9. NEI NEI
    NEI: Stands for National Eye Institute, one of the US National Institutes of Health. NEI's mission is to "conduct and support research, training, health information dissemination, and other programs with respect to blinding eye diseases, visual disorders, mechanisms of visual function, preser...
  10. Neisseria Neisseria
    Neisseria: Group of bacteria that includes the cause of gonorrhea. ...
  11. Neisseria infection Neisseria infection
    Neisseria infection: See: Meningococcal infection....
  12. NEJM NEJM
    NEJM: The New England Journal of Medicine....
  13. Nematodes Nematodes
    Nematodes: Roundworms. ...
  14. Neo- (prefix) Neo- (prefix)
    Neo- (prefix): Prefix meaning new. From the Greek "neos", new, young, fresh, recent. Examples of terms starting with "neo-" include neonatal and neonate (the newborn), neoplasia and neoplasm (new growth = tumor), etc. The opposite of neo- is paleo-. Although paleo- does enter occasionally into ...
  15. Neocortex Neocortex
    Neocortex: The newer portion of the cerebral cortex that serves as the center of higher mental functions for humans. The neocortex contains some 100 billion cells, each with 1,000 to 10,000 synapses (connections), and has roughly 100 million meters of wiring, all packed into a structure the size and...