/ Thesaurus / I Synonyms of immunoglobulin m Find synonyms for: Noun1. immunoglobulin M, IgM, immunoglobulin, Ig, immune serum globulin, immune gamma globulin, immune globulinusage: one of the five major classes of immunoglobulins; involved in fighting blood infections and in triggering production of immunoglobulin GWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language