Definition, Meaning & Synonyms

opsonin

noun

ˈɒpsənɪn

Definition

A substance that enhances the ability of phagocytic cells to bind and engulf pathogens.

Examples

Opsonins are crucial for the immune response, as they aid in the identification of bacteria.
The introduction of opsonins can greatly increase the effectiveness of vaccines.

Meaning

Opsonins are molecules that tag pathogens or foreign particles for destruction by cells of the immune system, making them more recognizable to phagocytes.