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Definition of antigen noun from the Oxford Advanced Learner's Dictionary

antigen

noun

/ˈæntɪdʒən/

/ˈæntɪdʒən/

(medical)

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a substance that enters the body and starts a process that can cause disease. The body then usually produces antibodies to fight the antigens.Topics Biologyc2
Word Originearly 20th cent.: via German from French antigène (from anti- + -gen).

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See antigen in the Oxford Advanced American DictionarySee antigen in the Oxford Learner's Dictionary of Academic English

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