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English definition of “immunoglobulin”

immunoglobulin

noun [C or U]     /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 noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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