Definition of antigen in English:


Syllabification: an·ti·gen
Pronunciation: /ˈan(t)əjən


A toxin or other foreign substance that induces an immune response in the body, especially the production of antibodies.
More example sentences
  • All the conjugated peptides were injected together in white rabbits as antigens for antibody production.
  • Antibodies are gamma globulins produced by B lymphocytes when antigens enter the body.
  • As a result, the patient's immune system would produce antibodies to attack the foreign antigens.


early 20th century: via German from French antigène (see anti-, -gen).



Pronunciation: /ˌantiˈjenik/
More example sentences
  • This may not be the case with weakly antigenic tumor antigens.
  • As one would expect, we found that two different antibodies with different antigenic specificities had different amino acid sequences in the antigen-binding site.
  • The very low level of amino acid diversity in antigenic proteins may be cause for optimism in the difficult fight to control global tuberculosis.

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