definition of immunology
imÂ·muÂ·nolÂ·oÂ·gy. n. The branch of biomedicine that is concerned with the structure and function of the immune system, innate and acquired immunity, and laboratory techniques involving the interaction of antigens with antibodies. imâ²muÂ·noÂ·logâ²ic (-nÉ-lÅjâ²Ä­k) , imâ²muÂ·noÂ·logâ²iÂ·cal adj.