Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun opsonin

1 sense of opsonin

Sense 1
opsonin -- (an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes)
       => antibody -- (any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response)