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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «N»:

  1. Nodule Nodule
    Nodule: A small solid collection of tissue, a nodule is palpable (can be felt). It may range in size from greater than 1.0 cm (3/8 inch) to somewhat less than 2 cm (13/16 inch) in diameter. A nodule may be present in the epidermis, dermis or subcutis (at any level in the skin). The word "nodule"...
  2. Nodule, Heberden Nodule, Heberden
    Nodule, Heberden: A small hard fixed bump on the finger, usually at the last joint of the finger. A Heberden nodule is a calcified spur of the joint (articular) cartilage. It serves as a useful sign of osteoarthritis. Named for the English physician William Heberden (1710-1801) who made a numbe...
  3. Noisome Noisome
    Noisome: Offensive to the senses and especially disgusting, offensive, or harmful to the sense of smell. For example, the smell of a chemical such as formaldehyde can be noisome. "Noisome" comes from the Middle English "noy" meaning "annoyance," and "enui" which in French also means "annoyance."...
  4. Nolvadex (tamoxifen) Nolvadex (tamoxifen)
    Nolvadex (tamoxifen): An antiestrogen (a drug that blocks the effects of estrogen) which competes with estrogen for binding sites in target tissues such as breast. Tamoxifen has been widely publicized. It was approved by the US Food and Drug Administration (FDA) to treat breast cancer and help prev...
  5. Nomenclature Nomenclature
    Nomenclature: A system of names used in a particular discipline, as in medicine and surgery, anatomy and biochemistry, etc. A standard system of nomenclature presupposes the existence of an organized classification of the entities within that field. From the Latin nomenclatura, a listing of names...
  6. Nomenclature of diseases Nomenclature of diseases
    Nomenclature of diseases: See: Disease nomenclature....
  7. Nominal  aphasia Nominal aphasia
    Nominal aphasia: See Anomia....
  8. Non-inferior clinical trial Non-inferior clinical trial
    Non-inferior clinical trial: A clinical trial that shows that a new treatment is equivalent to standard treatment. Also called a non-inferiority trial. See: Clinical trials. See also: Inconclusive clinical trial; Negative clinical trial; Positive clinical trial....
  9. Non-inferiority clinical trial Non-inferiority clinical trial
    Non-inferiority clinical trial: A clinical trial that shows that a new treatment is equivalent to standard treatment. Also called a non-inferior trial. See: Clinical trials. See also: Inconclusive clinical trial; Negative clinical trial; Positive clinical trial....
  10. Non-insulin-dependent diabetes Non-insulin-dependent diabetes
    Non-insulin-dependent diabetes: Type 2 diabetes. See also Diabetes, type 2....
  11. Non-rapid eye movement sleep Non-rapid eye movement sleep
    Non-rapid eye movement sleep: NREM (non-rapid eye movement) sleep is dreamless sleep. During NREM, the brain waves on the electroencephalographic (EEG) recording are typically slow and of high voltage, the breathing and heart rate are slow and regular, the blood pressure is low, and the sleeper is ...
  12. Non-small cell lung cancer Non-small cell lung cancer
    Non-small cell lung cancer: Cancer of the lung which is not of the small cell carcinoma (oat cell carcinoma) type. The term "non-small cell lung cancer" applies to the various types of bronchogenic carcinomas (those arising from the lining of the bronchi) which include adenocarcinoma, squamous cell ...
  13. Non-suicidal self injury (NSSI) Non-suicidal self injury (NSSI)
    Non-suicidal self injury (NSSI): A form of intentional physical self-damage or self-harm that is not accompanied by suicidal intent or ideation. The condition non-suicidal self-injury has been proposed for inclusion in the 5th edition of the Diagnostic and Statistical Manual of the American Psychia...
  14. Nonagenarian Nonagenarian
    Nonagenarian: Someone in his or her ninties, that is, between 90 and 99 years of age. See also: Age by decade....
  15. Nonalcoholic steatohepatitis Nonalcoholic steatohepatitis
    Nonalcoholic steatohepatitis: Fatty inflammation of the liver in people who do not abuse alcohol. NASH (nonalcoholic steatohepatitis) tends to occur especially in overweight women with diabetes. It is typically a chronic condition that causes no symptoms or very mild symptoms but can sometimes cause...