opsonin
English Thesaurus
1. an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes (noun.substance)
| hypernym | : | antibody, |
| definition | : | 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 (noun.substance) |
| substance meronym | : | blood serum, serum, |
| definition | : | an amber, watery fluid, rich in proteins, that separates out when blood coagulates (noun.body) |
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