Category: A

  • Anorexia, anorectic

    Loss of appetite for food.  

  • Angiotensin-converting enzyme inhibitors

    Agents that inhibit angiotensin-converting enzyme (a potent vasoconstrictor) and promote relaxation of blood vessels. A drug which inhibits the conversion of angiotensin I to II, which constricts arteries, used in the treatment of hypertension and heart failure. The enzyme that converts angiotensin I to angiotensin II is called angiotensin-converting enzyme. Angiotensin II controls the blood…

  • Angioplasty

    Repair of a narrowed blood vessel through surgery or other angiographic procedures. A technique using a catheter with a balloon that can be inflated to expand an artery. Plastic surgery to repair a blood vessel, e.g. a narrowed coronary artery. Surgery done on arteries, veins, or capillaries; a technique in which a balloon is inflated…

  • Anaplastic

    A change in the orientation and structure of cells; a loss of differentiation that is characteristic of malignancy. Undifferentiated cells. Referring to anaplasia.  

  • Amniography

    Radiography (after injection of radiopaque contrast medium into the amniotic fluid) of the pregnant uterus to detect placement of the placenta, the amniotic cavity, and the fetus. An X-ray of the womb. The making of X-ray pictures (amniograms) of the amniotic sac, which enables the placenta and umbilical cord to be visualized. Radiography of the…

  • Aggregation

    The coming together of entities such as platelets, blood cells, or diseases. Assembly, clumping, or clustering of cells, molecules, or substances. For example, platelets aggregate to help form a blood clot; white blood cells form an aggregation around foreign bodies (such as viruses) to try and destroy them. A clump, cluster, collection, or group of…

  • Adnexal

    Pertaining to accessory organs or tissues; an appendage (s).  

  • Adenosarcoma

    Cancerous gland like tumor, such as Wilms’ tumor. A mixed tumor composed of sarcomatous and glandular elements. A tumor with adenomatous and sarcomatous characteristics. A cancerous tumor originating from glandular tissue, also known as sarcoadenoma.  

  • Acyanotic

    Absence of a bluish appearance of the skin and mucous membranes. The term “acyanotic” is a diagnostic term indicating the absence of cyanosis, which refers to the bluish discoloration of the skin that occurs when blood oxygen levels are abnormally low. This term is frequently used in the context of classifying congenital heart diseases present…

  • Acute abdomen

    An abdominal condition of sudden onset, accompanied by pain resulting from intraabdorninal inflammation or infection. A serious intra-abdominal condition causing irritation and inflammation of the peritoneum and attended by pain, tenderness, and muscular rigidity. Any serious condition of the abdomen which requires surgery. The medical term for sudden, persistent, and severe abdominal pain. A person…