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Pronunciation: op'so-nin

Definition: Any blood serum protein that binds to antigens, enhancing phagocytosis ( C3b of the complement system, specific antibodies).

[G. opson, boiled meat, provisions, fr. hepso, to boil, + -in]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.