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immunoglobulin

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The definition of immunoglobulin is a protein that fights against disease.

(noun)

An example of an immunoglobulin is a protein that fights against strep throat.

See immunoglobulin in Webster's New World College Dictionary

noun

a globulin protein that participates in the immune reaction as the antibody for a specific antigen

See immunoglobulin in American Heritage Dictionary 4

noun Abbr. Ig

Any of a group of large glycoproteins that are secreted by plasma cells and that function as antibodies in the immune response by binding with specific antigens. There are five classes of immunoglobulins: IgA, IgD, IgE, IgG, and IgM.

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