opsonin

(ŏp-sō′nĭn)

To hear audio pronunciation of this topic, purchase a subscription or log in.

[Gr. opsonein, to purchase food]
A substance that coats foreign antigens, making them more susceptible to macrophages and other leukocytes, thus increasing phagocytosis of the organism. Complement and antibodies are the two main opsonins in human blood.
opsonic (-sŏn′ĭk)
To hear audio pronunciation of this topic, purchase a subscription or log in.
, adj.

There's more to see -- the rest of this topic is available only to subscribers.