Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun immune_system

1 sense of immune system

Sense 1
immune system -- (a system (including the thymus and bone marrow and lymphoid tissues) that protects the body from foreign substances and pathogenic organisms by producing the immune response)
       => system -- (a group of physiologically or anatomically related organs or parts; "the body has a system of organs for digestion")