immunodeficiency

英 [,ɪmjʊnəʊdɪ'fɪʃ(ə)nsɪ; ɪ,mjuːnəʊ-] 美[ɪ'mjənodɪ'fɪʃənsi]

1. immunological disorder in which some part of the body's immune system is inadequate and resistance to infectious diseases is reduced