Search Result for "immunodeficiency": 
Wordnet 3.0

NOUN (1)

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



WordNet (r) 3.0 (2006):

immunodeficiency
    n 1: immunological disorder in which some part of the body's
         immune system is inadequate and resistance to infectious
         diseases is reduced [ant: immunocompetence]