Meaning of opsonify

op•son•i•fy

Pronunciation: (op-son'u-fī"), [key]
— -fied, -fy•ing.
  1. to facilitate phagocytosis of (a microorganism, as a bacterium) by treatment with opsonin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.