Ig uncommon slang noun 1. a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response Synonymsimmunoglobulinimmune serum globulinimmune gamma globulinimmune globulin Related words Broader terms gamma globulinantibody Narrower terms immunoglobulin Aimmunoglobulin Dimmunoglobulin Eimmunoglobulin Gimmunoglobulin Mtetanus immunoglobulin WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
