immunoglobulin g(n = noun.substance) igg - one of the five major classes of immunoglobulins; the main antibody defense against bacteria;
is a kind of ig, immune gamma globulin, immune globulin, immune serum globulin, immunoglobulin

g, g clef, g man, g suit, g suit g-suit, immunoglobulin, immunoglobulin a, immunoglobulin d, immunoglobulin e, immunoglobulin m, letter g, penicillin g, tetanus immunoglobulin, vitamin g