Category: D

  • Delayed hypersensitivity reaction

    A localized skin response mediated by T cells, which occurs 24 to 72 hr after injection of a specific antigen to which the person has been previously sensitized. It is used routinely to screen for tuberculosis infection through injection of purified protein derivative of Mycobacterium tuberculosis. In patients with immunodeficiency, common microbial antigens to which…

  • Delayed health effect

    A consequence of an exposure to a contaminant, drug, toxin, or treatment that manifests itself months, years, or decades after the exposure.  

  • Dejerine-Sottas disease

    An inherited, progressive, motor, and sensory demyelinating neuropathy. Nerve roots from affected persons are hypertrophied.  

  • Dejecture

    A cast-down feeling or mental depression.  

  • Deja entendu

    Recognition of something previously understood.  

  • Deionization

    Removal of ions from a substance, producing a substance free of minerals.  

  • Deidentification

    The removal of personal identifying data (e.g., the patient’s name, date of birth, address, phone number, social security number) from a medical record in order to ensure patient confidentiality.  

  • Dehydroisoandrosterone

    A 17-ketosteroid excreted in normal male urine. It possesses androgenic activity.  

  • Dehydrogenate

    To remove hydrogen from a chemical compound.  

  • Dehydrocorticosterone

    A physiologically active steroid, C21H2804, isolated from the adrenal cortex. It is important in water and salt metabolism. Also called 11-dehydrocorticosterone.