immunologicaladjective
uk/ɪm.jə.nəˈlɒdʒ.ɪ.kel/us/ˌɪm.jə.nəˈlɑː.dʒɪ.kəl/specializedrelating to the structure and function of the immune system (= that part of the body that fights off viruses, bacteria, fungi, and other types of infection):
A monocyte is a white blood cell that can provide immunological defences against many infectious organisms.