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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «N»:

  1. Nasal polyps Nasal polyps
    Nasal polyps: Benign growths that originate in the mucous membranes lining the nasal passages or paranasal sinuses. Polyps are believed to arise in the nasal mucosa as a result of chronic inflammation. Up to 4% of adults have nasal polyps; they can also occur in children, particularly those with chr...
  2. Nasal prosthesis Nasal prosthesis
    Nasal prosthesis: An artificial device to replace part or all of a missing nose....
  3. Nasal septum Nasal septum
    Nasal septum: The dividing wall within the nose. The nasal septum runs down the middle of the nose creating two sides to the nose, each containing a passageway that ends in a nare (nostril). The nasal septum is not as simple a structure as it may seem. It consists of (in technical terms) the septal ...
  4. Nasal septum deviation Nasal septum deviation
    Nasal septum deviation: Failure of the nasal septum to be in the midline where it is supposed to be. (The nasal septum is the wall inside the nose that runs down the middle dividing it into two sides.) Deviation of the nasal septum may be congenital (present at birth) or occur later from trauma....
  5. Nasal septum hematoma Nasal septum hematoma
    Nasal septum hematoma: An accumulation of blood within the nasal septum, the wall inside the nose that runs down the middle dividing it into two sides. Most nasal septum hematomas are due to trauma. Treatment is incision (to drain the blood from the hematoma), packing of the nose (to keep the blood...
  6. Nasal septum perforation Nasal septum perforation
    Nasal septum perforation: A hole in the nasal septum, the wall inside the nose that runs down the middle dividing it into two sides. The hole provides a direct communication between the two normally-separate sides of the nose. Perforation of the nasal septum can be due to trauma (such as a blow ...
  7. Nasal-spray flu vaccine Nasal-spray flu vaccine
    Nasal-spray flu vaccine: See: Nasal flu vaccine....
  8. NASH NASH
    NASH: Nonalcoholic steatohepatitis....
  9. Naso- Naso-
    Naso-: Prefix referring to the nose. For example, nasogastric refers to the passage from the nose to the stomach....
  10. Nasoenteral tube Nasoenteral tube
    Nasoenteral tube: See: Nasogastric tube....
  11. Nasogastric Nasogastric
    Nasogastric: Referring to the passage from the nose to the stomach. A nasogastric tube is one that is passed through the nose (via the nasopharynx and esophagus) down into the stomach. The abbreviation for nasogastric is NG. The tube is an NG tube. "Nasogastric" is a hybrid -- part Latin, part Greek...
  12. Nasogastric tube Nasogastric tube
    Nasogastric tube: A tube that is passed through the nose and down through the nasopharynx and esophagus into the stomach. Abbreviated NG tube. It is a flexible tube made of rubber or plastic, and it has bidirectional potential. It can be used to remove the contents of the stomach, including air, to ...
  13. Nasopharynx Nasopharynx
    Nasopharynx: The area of the upper throat that lies behind the nose. In contrast to the oropharynx, the area of the throat that lies behind the mouth. The word "nasopharynx" is a hybrid -- part Latin, part Greek. "Naso-" is a prefix that has to do with the nose. It comes from the Latin "nasus" for...
  14. Nat'l Center for Complementary & Alternative Med. Nat'l Center for Complementary & Alternative Med.
    National Center for Complementary & Alternative Medicine: Abbreviated NCCAM. A part of the National Institutes of Health (NIH), this center "conducts and supports basic and applied research and training and disseminates information on complementary and alternative medicine to practitioners and t...
  15. Nat'l Inst. of Child Health and Human Dev.(NICHD) Nat'l Inst. of Child Health and Human Dev.(NICHD)
    National Institute of Child Health and Human Development (NICHD): One of the US National Institutes of Health, NICHD is in a sense the NIH for kids in that it is concerned with child health. The mission of the NICHD is, in formal terms, to support and conduct "research on fertility, pregnancy,...