Definitions

1. noun

A molecule, typically a protein, that binds to the surface of a pathogen and makes it more susceptible to phagocytosis by immune cells

“Opsonins play a key role in enhancing the ability of macrophages to engulf and destroy bacteria.”

2. noun

A type of antibody that binds to and enhances the phagocytosis of a specific antigen

“The opsonin was found to be highly effective in targeting and eliminating cancer cells.”