gamma globulin

/G AE1 M AH0 G L AA1 B Y AH0 L IH0 N/
noun
  1. 1

    A fraction of blood serum containing the most antibodies.

  2. 2

    A class of proteins in the blood, identified by their position after serum protein electrophoresis. The most significant gamma globulins are antibodies.

Source: https://en.wiktionary.org/wiki/gamma%20globulin