This page provides all possible meanings and translations of the word igm
Princeton's WordNetRate this definition:(0.00 / 0 votes)
immunoglobulin M, IgM(noun)
one of the five major classes of immunoglobulins; involved in fighting blood infections and in triggering production of immunoglobulin G
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The major immunoglobulin secreted during a primary immune response. IgM binds with low affinity but high avidity (multiple binding sites) because it not only occurs as monomers but also as pentamers and hexamers.