Gain a better understanding of medical terminology by searching our dictionary of more than 1,300 terms.


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  • dwarfism

    A deficiency of growth hormone resulting in short stature.

  • duodenal

    Having to do with the duodenum.

  • dropsy

    Abnormal buildup of fluid in tissues or a body cavity.

  • dressing

    A bandage for an external wound.

  • DPT

    A vaccine containing antigens from diphtheria, pertussis and tetanus.

  • Down syndrome

    A genetic disorder characterized by some degree of mental retardation and by various physical malformations, such as slanted eyes and…

  • douche

    A flow of liquid or vapor directed onto or into a part of the body.

  • diverticula

    Pouches or sacs opening out from a main cavity or tubular organ of the body.

  • diuresis

    Increased elimination of urine.

  • distal

    A location farther from a point of reference. For example, the foot is distal to the knee, relative to the…

  • discoid lupus erythematosus

    A round, red, scaling rash on the nose, forehead, cheeks, scalp or other areas of the body. It may be…

  • diplopia

    Double vision.

  • digit

    A finger or toe.

  • digestion

    The mechanical and chemical conversion of food into simpler compounds that can be absorbed by the body.

  • diet

    The total food consumed by an individual. A therapeutic diet is a prescription of required or restricted foods.

  • diastolic

    Diastolic blood pressure is the pressure when your heart relaxing between beats and filling with blood.

  • diastole

    The relaxation phase of the heartbeat.

  • diagnosis

    The process of identifying a disease or medical condition.

  • diagnose

    To identify a disease.

  • diabetes mellitus

    A disorder of carbohydrate metabolism resulting from insulin deficiency. Characterized by high blood sugar levels that result in weakness, frequent…

  • dermabrasion

    A procedure that removes scars, tattoos or other skin defects with fine sandpaper or a high-speed brush.