immune system

noun

Definition of immune system 

: the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), macrophages, lymphocytes including the B cells and T cells, and antibodies

Examples of immune system in a Sentence

Recent Examples on the Web

Burkitt lymphoma affects the lymph system, a part of the body's immune system. Andrea Park, SELF, "After a Second Back Surgery, Abby Lee Miller Shows Off Her Healing Progress on Instagram," 2 July 2018 This is likely a result of the priming effect these activities have on a child's immune system early on. Jason Lemon, ajc, "Childhood leukemia may be triggered by germs and could be prevented, study suggests," 24 May 2018 Immunotherapy is a new type of treatment that harnesses the body's own immune system to attack the cancer. Orlando Sentinel, OrlandoSentinel.com, "PODCAST: Using the immune system to fight cancer (Ep. 29)," 21 May 2018 The Hopkins patient received an extra experimental step, an infusion of bone marrow from his donor that research suggests may help a recipient's immune system better tolerate a transplant. Fox News, "Veteran who survived blast receives first complete penis transplant," 23 Apr. 2018 The Hopkins patient received an extra experimental step, an infusion of bone marrow from his donor that research suggests may help a recipient's immune system better tolerate a transplant. CBS News, "Veteran who survived blast receives "world's most extensive" penis, scrotum transplant," 23 Apr. 2018 The Hopkins patient received an extra experimental step, an infusion of bone marrow from his donor that research suggests may help a recipient's immune system better tolerate a transplant. Lauran Neergaard, chicagotribune.com, "Veteran receives experimental penis transplant after 'unspoken injury of war'," 23 Apr. 2018 With non-Hodgkins's lymphoma, the cancer starts with white blood cells called lymphocytes, which are part of the body's immune system, according to the American Cancer Society. Sara M Moniuszko, USA TODAY, "Abby Lee Miller, former 'Dance Moms' star, preliminarily diagnosed with Burkitt Lymphoma," 19 Apr. 2018 Immunotherapy, which harnesses the body's immune system to attack tumors, is known to improve survival in patients who have already been treated with chemo. Susan Scutti, CNN, "Treatment combo nearly doubles survival time in lung cancer patients, study finds," 16 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'immune system.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of immune system

circa 1919, in the meaning defined above

Keep scrolling for more

Learn More about immune system

Share immune system

Statistics for immune system

Last Updated

13 Oct 2018

Look-up Popularity

Time Traveler for immune system

The first known use of immune system was circa 1919

See more words from the same year

Keep scrolling for more

More Definitions for immune system

immune system

noun

English Language Learners Definition of immune system

: the system that protects your body from diseases and infections

immune system

noun

Kids Definition of immune system

: the system of the body that fights infection and disease and that includes especially the white blood cells and antibodies and the organs that produce them

immune system

noun

Medical Definition of immune system 

: the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), lymphocytes including the B cells and T cells, and antibodies

Keep scrolling for more

Comments on immune system

What made you want to look up immune system? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

evasion of direct action or statement

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!