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antigen

play
noun an·ti·gen \ˈan-ti-jən, -ˌjen\

Simple Definition of antigen

  • medical : a harmful substance that causes the body to produce antibodies

Source: Merriam-Webster's Learner's Dictionary

Full Definition of antigen

  1. :  any substance (as an immunogen or a hapten) foreign to the body that evokes an immune response either alone or after forming a complex with a larger molecule (as a protein) and that is capable of binding with a product (as an antibody or T cell) of the immune response

antigenicplay \ˌan-ti-ˈje-nik\ adjective
antigenicallyplay \-ni-k(ə-)lē\ adverb
antigenicityplay \-jə-ˈni-sə-tē\ noun

Origin of antigen

German, from French antigène, from anticorps antibody + -gène -gen


First Known Use: 1908


Medical Dictionary

antigen

play
noun an·ti·gen \ˈant-i-jən\

Medical Definition of antigen

  1. :  any substance (as an immunogen or a hapten) foreign to the body that evokes an immune response either alone or after forming a complex with a larger molecule (as a protein) and that is capable of binding with a product (as an antibody or T cell) of the immune response

an·ti·gen·ic \ˌant-i-ˈjen-ik\play adjective
an·ti·gen·i·cal·ly \-i-k(ə-)lē\play adverb


Illustration of antigen



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