Meaning of gamma globulin

gam'ma glob'ulin

Pronunciation: [key]
— Immunol. Immunol.
  1. a protein fraction of blood plasma that responds to stimulation of antigens, as bacteria or viruses, by forming antibodies: administered therapeutically in the treatment of some viral diseases.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.