Medicine. Exhibiting or characterized by specific biochemical or immunological affinity; spec. = opsonic, adj. Compare neurotropic, adj. 1. Now rare…

= cytophilic adj. (a).

(a) designating the part of an antibody that binds antigen; of or relating to this part (now historical); (b) designating an antibody that attaches…

Of or relating to opsonins; produced by or involving opsonins.

of or relating to the opsonization of tubercle bacilli.

Designating an opsonin whose molecule lacks a group with an active opsonic effect (see quot. 1907).

= opsonic, adj.

caused by or involving reagin; of, relating to, or of the nature of (a) reagin.

Biol. Designating or relating to antibodies to DNA, RNA, or any of various proteins associated with the nucleus.