Disease or Syndrome
immunodeficiency Audio
im·mu·no·de·fi·cien·cy [ im-yuh-noh-di-fish-uhn-see, ih-myoo- ]
Subclass of:
Immune System Diseases
Definitions related to immunologic deficiency syndromes:
  • (immunodeficiency) A deficiency of immune response or a disorder characterized by deficient immune response.
    U.S. FDA Glossary
    U.S. Food & Drug Administration, 2021
  • (immunodeficiency) A disorder in which the immune system is unable to mount an adequate immune response.
    NCI Thesaurus
    U.S. National Cancer Institute, 2021
  • (immunodeficiency) A state in which the immune system is compromised or absent. May be primary (congenital) or secondary (acquired).
    NICHD Pediatric Terminology
    U.S. National Cancer Institute, 2021
  • (immunodeficiency) Deficiency of immune response or a disorder characterized by deficient immune response; classified as antibody (B cell), cellular (T cell), or combined immunodeficiency, or phagocytic dysfunction disorders.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • (immunodeficiency) Failure of the immune system to protect the body adequately from infection, due to the absence or insufficiency of some component process or substance.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2021
  • (immunodeficiency) The inability of the body to produce an immune response.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • Syndromes in which there is a deficiency or defect in the mechanisms of immunity, either cellular or humoral.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • Immunodeficiency disorders are associated with or predispose patients to various complications, including infections, autoimmune disorders, and lymphomas and other cancers. Primary immunodeficiencies are genetically determined and can be hereditary; secondary immunodeficiencies are acquired and much more common.
    Merck Manuals
    Merck & Co., Inc., 2020
  • Immunodeficiency, Defect in immunity that impairs the body's ability to resist infection. The immune system may fail to function for many reasons. Immune disorders caused by a genetic defect are usually evident early in life. Others can be acquired at any age through infections (e.g., AIDS) or...
    Encyclopedia Britannica
    Encyclopedia Britannica, Inc., 2020
Try this search on: Farlex, Merriam-Webster, Oxford Dictionary, or Wordnik

This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.