plasma, plasm - colorless watery fluid of blood and lymph containing no cells and in which erythrocytes and leukocytes and platelets are suspended

plasma protein - any of the proteins in blood plasma

globulin - a family of proteins found in blood and milk and muscle and in plant seed

Ig, immune gamma globulin, immune globulin, immune serum globulin, immunoglobulin - a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response