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Definition of immune system noun from the Oxford Advanced Learner's Dictionary

immune system

noun
 
/ɪˈmjuːn sɪstəm/
 
/ɪˈmjuːn sɪstəm/
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  1. the system in your body that produces substances to help it fight against infection and disease
See immune system in the Oxford Advanced American DictionarySee immune system in the Oxford Learner's Dictionary of Academic English
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