Category: G

  • Granulopoiesis

    The normal production of granulocytes in the bone marrow. The process of production of granulocytes, which normally occurs in the blood-forming tissue of the bone marrow. Granulocytes are ultimately derived from a hemopoietic stem cell, but the earliest precursor that can be identified microscopically is the myeloblast. This divides and passes through a series of…

  • Granulomatosis

    Persistent inflammation leading to the formation of nodules. Condition characterized by the development of widespread granulomas. Any condition marked by multiple widespread granulomas. Wegener’s granulomatosis is a fatal disease characterized by granulomas in the respiratory tract, frequently arising in the nasopharynx. Any medical condition characterized by the development of numerous granulomas, which are collections of…

  • Granulocytopenia

    A usually fatal disease caused by the lowering of the number of granulocytes in the blood due to bone marrow malfunction. A reduction in the number of granulocytes (a type of white cell) in the blood. An abnormal reduction of granulocytes in the blood. A condition distinguished by an insufficiency of white blood cells.  

  • Granular cast

    A cast composed of cells filled with protein and fatty granules. A cellular cast derived from a kidney tubule. In certain kidney diseases, notably acute glomerulonephritis, abnormal collections of renal tubular cells are shed from the kidney, often as a cast of the tubule. The casts can be observed on microscopic examination of the centrifuged…

  • Granular

    Made up of granules.  

  • Grand multiparity

    The fact of having given birth to more than four children.  

  • Grand mal

    A type of epilepsy, in which someone becomes unconscious and falls down, while the muscles become stiff and twitch violently. Type of seizure during which the patient becomes unconscious, may develop bluish discoloration (cyanosis) of the skin and lips due to oxygen lack, and experiences convulsions involving the entire body; also called a generalized seizure.…

  • Gram’s stain

    A method of staining bacteria so that they can be identified [Described 1884. After Hans Christian Joachim Gram (1853-1938), Professor of Medicine in Copenhagen, Denmark. He discovered the stain by accident as a student in Berlin, Germany.] Basic bacteriological staining method of wide application, by means of which all micro-organisms are classified as ‘Gram-positive’ or…

  • Gram-positive bacterium

    A bacterium which retains violet dye and appears blue-black when viewed under the microscope.  

  • Gram-negative bacterium

    A bacterium which takes up the red counterstain, after the alcohol has washed out the first violet dye.