Category: A

  • Angstrom

    Angstrom unit. Unit of measure of wavelength (as of ultraviolet radiation or X rays) equal to 1 ten-millionth of a meter, or 0.1 nanometer. A unit of length equal to one ten millionth of a millimeter (10 ⁻ ¹⁰ m). It is not a recommended SI unit but is sometime used to express wavelengths and inter atomic…

  • Angle of lewis

    In anatomy, a bony prominence on the breastbone just inferior to the junction of the clavicle and the sternum and just opposite the second intercostal space.  

  • Angiosarcoma

    A rare form of liver cancer. A malignant tumour in a blood vessel. Malignant tumor of blood vessels. Malignant neoplasm originating from blood vessels.  

  • Angioneurotic edema

    A condition characterized by hives and swelling of the tissues as a result of allergy. A condition characterized by the swelling of loose tissues in the body, particularly in the face and the scrotum in males. This swelling may be a symptom of allergies or emotional disturbances and is also referred to as “giant urticaria.”…

  • Angiogram

    An X-ray viewing of a blood vessel following injection of a dye. A medical test in which a contrasting material is injected into a deep artery in the body, such as in the groin or neck, and X-rays are taken as the material flows through the body. Angiograms can be used in many situations. In…

  • Anger

    One of the three most powerful emotions is frequently associated with frustration and fear and may be manifest through hostility, verbal, or physical. Watson refers to as rage, displacement of anger. The feeling state associated with (a) the “fight” component of the fight-or-flight response that can range from irritation to rage and (b) harm and…

  • Aneurism

    A sac formed by dilated wall of an artery or vein and is filled with blood. There are three basic form: (a) fusiform, which is a bulging of the blood vessel due to a weakened wall; (b) sacculated, which is the formation of a sac on the side of the blood vessel; and (c) dissecting,…

  • Anethopath

    A person possessing a pathological lack of development in the Moral-ethical aspects of the personality psychopath.  

  • Anesthetist

    A trained physician or nurse who administers anesthesia, for general anesthesia. A medically qualified doctor who administers an anesthetic to induce unconsciousness in a patient before a surgical operation. A person who administers anesthesia. An anesthetist may be a nurse, dentist, physician, or other individual. One who administers anesthetics, especially for general anesthesia; may be…

  • Anesthesiology

    The study of anesthesia and anesthetics. The medical specialty that focuses on relieving pain and providing medical care to surgical patients before, during, and after surgery. An anesthesiologist is a physician who specializes in anesthesiology. The medical specialty concerned with anesthesia, including its pharmacology and physiology, and with related fields, such as respiratory therapy, resuscitation,…