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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «L»:

  1. Lungs Lungs
    Lungs: The lungs are a pair of breathing organs located with the chest which remove carbon dioxide from and bring oxygen to the blood. There is a right and left lung. ...
  2. Lunula Lunula
    Lunula: 1. The crescent-shaped area at the base of a fingernail or toenail. 2. Any small crescent- or moon-shaped area or structure. Lunula is the diminuitive of the Latin luna, the moon. Also called the lunule....
  3. Lunule Lunule
    Lunule: 1. The crescent-shaped area at the base of a fingernail or toenail. 2. Any small crescent- or moon-shaped area or structure. Borrowed from the French lunule, from the Latin lunula, the diminuitive of luna, the moon. Also called the lunula....
  4. Lupus Lupus
    Lupus: A chronic inflammatory condition caused by an autoimmune disease. An autoimmune disease occurs when the body's tissues are attacked by its own immune system. Patients with lupus have unusual antibodies in their blood that are targeted against their own body tissues. Lupus can cause disease of...
  5. Lupus in pregnancy Lupus in pregnancy
    Lupus in pregnancy: Systemic lupus erythematosus (SLE) during pregnancy, a high-risk situation. The high risks are to both the mother and child. Women with SLE can have flares of SLE during pregnancy. There is also a markedly increased risk of a miscarriage (spontaneous abortion). The presence of ...
  6. LUQ LUQ
    LUQ: Abbreviation for the left upper quadrant (quarter). The LUQ of the abdomen contains the spleen. (By contrast, RUQ stands for the right upper quadrant, LLQ stands for the left lower quadrant, and RLQ stands for the right lower quadrant.)...
  7. Luschka, foramina of Luschka, foramina of
    Luschka, foramina of: Two openings from the fourth ventricle, one in a system of four communicating cavities called ventricles within the brain that are continuous with the central canal of the spinal cord. The four ventricles consist of the two lateral ventricles, the third ventricle and the fourth...
  8. Luteinizing hormone Luteinizing hormone
    Luteinizing hormone: A hormone released by the pituitary gland in response to luteinizing hormone- releasing hormone. Abbreviated LH, it controls the length and sequence of the female menstrual cycle, including ovulation, preparation the uterus for implantation of a fertilized egg, and ovarian p...
  9. Luteinizing hormone-releasing hormone Luteinizing hormone-releasing hormone
    Luteinizing hormone-releasing hormone: A hormone that controls sex hormones in men and women. Also called LHRH. ...
  10. Luxation Luxation
    Luxation: Complete dislocation of a joint. A partial dislocation is a subluxation....
  11. LVAD LVAD
    LVAD: Left ventricular assist device. See: Ventricular assist device....
  12. LVF LVF
    LVF: 1. Left ventricular failure, failure of the left side of the heart. 2. Left ventricular function, the function of the left ventricle. In both of these senses, LVF is in contrast to RVF (right ventricular failure or function)....
  13. LVRS LVRS
    LVRS: Lung volume reduction surgery. See: Lung reduction surgery....
  14. Lycanthropy Lycanthropy
    Lycanthropy: The delusion that one has become a wolf or the werewolf transformation. Werewolf myths were associated with the phases of the moon. The werewolf was thought to take over when the moon was full. The word "lycanthropy" is from the Greek "lykos," meaning "wolf" + "anthropos" meaning "hum...
  15. Lycopene Lycopene
    Lycopene: A red pigment found predominantly in tomatoes (and also in some other fruits) that gives them their color. Lycopene has antioxidant properties and has been claimed to "promote a healthy heart" and to reduce the risk of cancer. Lycopene has not, however, been proven to contribute to the a...