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Drugs and diseases reference index

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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «L»:

  1. Lassitude Lassitude
    Lassitude: Weakness, weariness, listlessness, exhaustion, lethargy. For example, the patient complained of lassitude. Borrowed from French, from Latin lassitudo, from lassus meaning weary....
  2. Last menstrual period Last menstrual period
    Last menstrual period: By convention, pregnancies are dated in weeks starting from the first day of a woman's last menstrual period (LMP). If her menstrual periods are regular and ovulation occurs on day 14 of her cycle, conception takes place about 2 weeks after her LMP. A woman is therefore consid...
  3. Late infantile neuroaxonal dystrophy Late infantile neuroaxonal dystrophy
    Late infantile neuroaxonal dystrophy: See: Hallervorden-Spatz disease....
  4. Latent Latent
    Latent: Hidden, dormant, inactive. The virus that causes chickenpox remains latent after the initial attack of chickenpox is over. When it becomes reactivated, usually many years later, the virus causes shingles. HIV may remain in a small long-lived population of infected T cells. These cells prov...
  5. Lateral Lateral
    Lateral: 1. In anatomy, the side of the body or a body part that is farther from the middle or center of the body. Typically, lateral refers to the outer side of the body part, but it is also used to refer to the side of a body part. For example, when referring to the knee, lateral refers to the si...
  6. Lateral collateral ligament (LCL) of the knee Lateral collateral ligament (LCL) of the knee
    Lateral collateral ligament (LCL) of the knee: The knee joint is surrounded by a joint capsule with ligaments strapping the inside and outside of the joint (collateral ligaments) as well as crossing within the joint (cruciate ligaments). These ligaments provide stability and strength to the knee joi...
  7. Lateral epicondylitis Lateral epicondylitis
    Lateral epicondylitis: See: Tennis elbow....
  8. Lateral meniscus of the knee Lateral meniscus of the knee
    Lateral meniscus of the knee: The word "meniscus" refers to a crescent-shaped structure. The lateral meniscus of the knee is a thickened crescent-shaped cartilage pad between the two joints formed by the femur (the thigh bone) and the tibia (the shin bone). The meniscus acts as a smooth surface ...
  9. Lateral ventricle Lateral ventricle
    Lateral ventricle: One cavity in a system of four communicating cavities within the brain that are continuous with the central canal of the spinal cord. The four ventricles consist of two lateral ventricles, the third ventricle and the fourth ventricle: Lateral ventricles: The lateral ventricles a...
  10. Lateral X-ray Lateral X-ray
    Lateral X-ray: An X-ray picture taken from the side....
  11. Latham bowl Latham bowl
    Latham bowl: A blood-processing instrument that uses centrifugal force to separate blood into its components: red blood cells, white blood cells, plasma and platelets. Developed by Allen (Jack) Latham Jr. who had grown up on a farm, so the design "was like a milk separator." The Latham bowl revoluti...
  12. Lattice dystrophy Lattice dystrophy
    Lattice dystrophy: A form of hereditary corneal dystrophy in which there is an accumulation of amyloid deposits, or abnormal protein fibers, throughout the middle and anterior stroma of the cornea. These deposits in the stroma appear on an eye examination as clear, comma-shaped overlapping dots and ...
  13. Laughing gas Laughing gas
    Laughing gas: Nitrous oxide, a gas that can cause general anesthesia. Nitrous oxide is sometimes given in the company of other anesthetic agents but it is never used today as the only anesthetic agent because the concentration of nitrous oxide needed to produce anesthesia is close to the concentrati...
  14. Launois-Bensaude syndrome Launois-Bensaude syndrome
    Launois-Bensaude syndrome: A disorder characterized by painless symmetrical diffuse deposits of fat beneath the skin of the neck, upper trunk, arms and legs. The condition is thought to be genetic although its exact mode of inheritance is uncertain; it may be a mitochondrial DNA disease. It frequen...
  15. Lauterbur Lauterbur
    Lauterbur: See: Lauterbur, Paul C....