Main Entry: immune complex Function: noun : any of various molecular complexes formed in the blood by combination of an antigen and an antibody that tend to accumulate inbodily tissue and are associated with various pathological conditions (as glomerulonephritis, vasculitis, and systemic lupus erythematosus)
immune complexn. Any of various complexes of an antigen and an antibody in the blood, to which complement may also be fixed, and which may form a precipitate.