Category: V

  • Venous blood gases

    Oxygen and carbon dioxide levels in venous blood.  

  • Venography

    Technique of preparing X-ray images of a vein injected with a radiopaque contrast medium. X-ray examination of the veins after injection of dye that absorbs the x-rays. A radiographic procedure that shows the internal structures of veins after the patient receives an injection of contrast medium. X-ray examination to show up the course of veins…

  • Venogram

    Ray film of veins injected with a radiopaque contrast medium.  

  • Vastus

    Any of three muscles that form part of the quadriceps muscle of the thigh. Any of three muscles (vastus intermedius, vastus lateralis, and vastus medialis) that form part of the quadriceps muscle of the thigh.  

  • Varicosis

    Condition characterized by one or more varicose veins.  

  • Valgus

    To a deformity in which part of a limb is turned outward or twisted away from the center of the body (e.g., talipes valgus, a deformity in which the foot is twisted outward). Structural deformation of being bent or turned outward; most often used to describe extremities. Abnormally turned out. Valgus is an adjective used…

  • Vaginal cancer

    Malignancy of the vagina; it most often results from the spread of cancer from another organ, especially the uterus or ovaries, but may occur as a primary neoplasm, especially in women exposed while in the uterus to diethylstilbestrol (given to their mothers to prevent spontaneous abortion). Treatment depends on the size and location of the…

  • Volutin granules

    Granules in bacilli or yeasts, with an intense affinity for basic dyes (cf. lipid granules) and staining metachromatically with methylene or toluidine blue to give a red-violet colour contrasting with the blue of the bacillary protoplasm.  

  • Viskaps

    Cellulose caps which, fitted wet and loosely over bottle tops, dry and shrink to produce a tight dustproof seal.  

  • Viruses

    Infective agents of ultramiscroscopic size, filter-passing, intracellular, obligatorily parasitic, cultivable only on living cells as opposed to the classical inanimate culture media, and resistant to many antibiotics and chemical agents lethal to bacteria. Viruses are measured by their size in nanometres, vary from 10 to 450 nm, and consist of a core of nucleic acid…