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 Scientists overcame those hurdles by using synthetic RNA that the body's immune system doesn't recognize and encasing that material in lipid nanoparticles. Dr. John Brownstein, ABC News, 22 May 2021 Like its rival Moderna, the company's vaccine uses mRNA technology to prime the body's immune system to attack the virus. Frank Jordans, Star Tribune, 10 May 2021 But in the months afterward the body's immune system sometimes attacks the donor organ, which can have deadly consequences. Harini Barath, Scientific American, 23 Apr. 2021 The theory goes that the contaminants weaken the body's immune system, making the virus more effective. Jeff Berardelli, CBS News, 12 Apr. 2021 Therapies that seek to turn the body's own immune system into a potent weapon against cancer are offering hope to millions of patients around the globe. Jeremy Kahn, Fortune, 16 Mar. 2021 The rationale behind a third dose is rooted in the body's immune system: The more vaccine doses, the greater the antibody response and hopefully the better protection against the new variants. Miriam Fauzia, USA TODAY, 12 Mar. 2021 This occurs when an infection causes the body's immune system to flood the bloodstream with inflammatory proteins known as cytokines. David Hogberg, Washington Examiner, 21 Jan. 2021 Once injected, the body's immune system makes antibodies to the spikes. Eric Levenson, CNN, 17 Dec. 2020

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.

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First Known Use of immune system

circa 1919, in the meaning defined above

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Time Traveler for immune system

Time Traveler

The first known use of immune system was circa 1919

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Statistics for immune system

Last Updated

9 Jun 2021

Cite this Entry

“Immune system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immune%20system. Accessed 13 Jun. 2021.

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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

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