immunoglobulin
noun [ C or U ] medical specialized uk/ˌɪm.jəːn.əʊˈɡlɒb.jə.lɪn/ us/ˌɪm.jə.noʊˈɡlɑː.bjə.lɪn/ (abbreviation IG)
免疫球蛋白
a protein (= chemical substance) produced by the body that can destroy harmful bacteria in the body. There are five different types: IgA, IgD, IgE, IgG, and IgM