OPSONIN

/ˈɒpsənɪn/ Scrabble 9 Words With Friends 12

Scrabble letter values: O1P3S1O1N1I1N1 = 9

Definition

  1. noun an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes.

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