"immunoglobulin" in the noun sense
1. immunoglobulin, Ig, immune serum globulin, immune gamma globulin, immune globulin
a class of proteins produced in lymph tissue in vertebrates and that function as antibodies in the immune response
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License