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English definition of “immunoglobulin”

immunoglobulin

noun [C or U] uk   /ɪˌmjuːn.əʊˈɡlɒb.jə.lɪn/ us    /ˌɪm.jə.noʊˈɡlɑb.jə.lɪn/ (also IG) specialized
a protein produced by the body that can destroy harmful bacteria in the body. There are five different types: IgA, IgD, IgE, IgG, and IgMThe circulatory system and blood
(Definition of immunoglobulin from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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