immunochemistry UK /ˌɪˌmjuːnəʊˈkɛmɪstri/US /ˌɪˌmjuːnoʊˈkɛmɪstɹi/ noun1 •The study of the structure of antibody molecules (immunoglobulins) and of their ability to bind with antigens of diverse chemical structure. formsimmunochemistries