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Medical Dictionary Definitions A-Z List

Medical Dictionary Definitions A - Z - «A»:

  1. Adoption medicine Adoption medicine
    Adoption medicine: Medicine for the adopted child, including pre-adoption counseling and evaluation based on a child's medical records as well as post-adoption consultations and, often, primary care of the adopted child. The field of adoption medicine began to emerge toward the end of the 20th centu...
  2. ADR ADR
    ADR: Adverse drug reaction. See: Adverse reaction.....
  3. Adrenal cortex Adrenal cortex
    Adrenal cortex: The outer portion of the adrenal gland located on top of each kidney. The adrenal cortex produces steroid hormones which regulate carbohydrate and fat metabolism and mineralocorticoid hormones which regulate salt and water balance in the body. Underfunction of the adrenal cortex resu...
  4. Adrenal failure Adrenal failure
    Adrenal failure: A condition in which the adrenal glands do not produce enough of the adrenal hormones that control important functions such as blood pressure. The adrenal glands sit on top of the kidneys. The adrenal is made up of an outer layer (the cortex) and an inner portion (the medulla). The ...
  5. Adrenal gland Adrenal gland
    Adrenal gland: One of a pair of small glands, each of which sits on top of one of the kidneys. The adrenal is made up of an outer wall (the cortex) and an inner portion (the medulla). The adrenal glands produce hormones that help control the heart rate, blood pressure, the way the body uses fo...
  6. Adrenal medulla Adrenal medulla
    Adrenal medulla: The inner portion of adrenal gland. (The outer portion is the adrenal cortex). The adrenal medulla makes epinephrine (adrenaline) and norepinephrine (noradrenaline). Epinephrine is secreted in response to low blood levels of glucose as well as exercise and stress; it causes the brea...
  7. Adrenaline Adrenaline
    Adrenaline: A substance produced by the medulla (inside) of the adrenal gland, adrenaline (the official name in the British Pharmacopoeia) is synonymous with epinephrine. Technically speaking, adrenaline is a sympathomimetic catecholamine. It causes quickening of the heart beat, strengthens the forc...
  8. Adrenoleukodystrophy Adrenoleukodystrophy
    Adrenoleukodystrophy: A rare genetic (inherited) disorder characterized by the breakdown or loss of the myelin sheath surrounding nerve cells in the brain and progressive dysfunction of the adrenal gland. Adrenoleukodystrophy (ALD) is one of a group of genetic disorders called the leukodystrophies t...
  9. ADU ADU
    ADU: Accessory dwelling unit....
  10. Adult acne Adult acne
    Adult acne: Popular name for rosacea. For more information, see: Rosacea....
  11. Adult ADHD Adult ADHD
    Adult ADHD: Attention deficit hyperactivity disorder (ADHD) as found in the adult population. ADHD is a well-known childhood disorder that is characterized by varying degrees of hyperactivity, impulsivity, and/or inattention that lead to difficulty in academic, emotional, and social functioning....
  12. Adult primary liver cancer Adult primary liver cancer
    Adult primary liver cancer: A tumor in which the cancer starts during adulthood in cells in the liver. Also called hepatocellular carcinoma. Primary liver cancer is different from cancer that has metastasized (spread) from another place in the body to the liver. The signs and symptoms may inclu...
  13. Adult respiratory distress syndrome Adult respiratory distress syndrome
    Adult respiratory distress syndrome: Better known as ARDS. See: ARDS....
  14. Adult T-cell leukemia Adult T-cell leukemia
    Adult T-cell leukemia: Abbreviated ATL. A malignancy of mature T lymphocytes (T cells) with its onset in adulthood caused by infection with the human T-lymphotropic virus (HTLV) and characterized by circulating malignant T-lymphocytes, skin lesions, lymphadenopathy (enlarged lymph nodes), hepatosple...
  15. Adult T-cell leukemia/lymphoma Adult T-cell leukemia/lymphoma
    Adult T-cell leukemia/lymphoma: See: Adult T-cell leukemia....