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Noun antigen has 1 sense
  1. antigen - any substance (as a toxin or enzyme) that stimulates the production of antibodies
    --1 is a kind of
    substance, matter
    --1 has particulars:
     immunogen, immunizing agent; agglutinogen; fetoprotein, foetoprotein; anatoxin, toxoid; rhesus factor, Rh factor, Rh
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