noun
- 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. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). immune system. Retrieved September 21, 2026, from http://smartdefine.org/immune_system/definitions/1213072 |
| Chicago | WordNet. 2010. "immune system" http://smartdefine.org/immune_system/definitions/1213072 (accessed September 21, 2026). |
| Harvard | WordNet 2010, immune system, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/immune_system/definitions/1213072>. |
| MLA | WordNet. "immune system" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/immune_system/definitions/1213072> |