immune system is a noun meaning "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". It carries one recorded sense.
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
Definitions, synonyms and semantic relations for immune system come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.