The definition of immunoglobulin is a protein that fights against disease.
An example of an immunoglobulin is a protein that fights against strep throat.
a globulin protein that participates in the immune reaction as the antibody for a specific antigen
- Any of a group of large glycoproteins, including all the antibodies that function in the vertebrate immune system, that have a structure consisting of two heavy chains and two light chains. There are five major classes of immunoglobulin isotypes: IgA, IgD, IgE, IgG, and IgM.
- A preparation containing immunoglobulin proteins, especially immune globulin.
From immuno- + globulin.