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

The study would replicate similar studies he’s done testing the impact of meditation performed during in-person sessions, which showed a positive impact on brain functioning and the immune system. Sumathi Reddy, WSJ, "From Meditation to Medication: Headspace Has a Prescription Strategy," 25 June 2018 In late October 2018, Selma Blair revealed she was diagnosed with multiple sclerosis — a disease causing the immune system to mistakenly attack the central nervous system. Ariel Henley, Allure, "How Fashion Lets Me Embrace the Physical Differences Caused by Crouzon Syndrome," 12 Mar. 2019 Similar survival trends have been seen with some other therapies that enlist the immune system against different types of cancer. Marilynn Marchione, chicagotribune.com, "Enemy turned ally: How poliovirus is used to fight brain tumors," 26 June 2018 Among them is the possibility that cancer, and/or its treatment, somehow knocks the immune system off balance and unleashes a toxic flood of inflammatory agents upon the central nervous system. Melissa Healy, latimes.com, "What causes ‘chemobrain’? It’s time for neuroscientists to get serious about finding out, experts say," 13 June 2018 The bacteria in our guts metabolize fiber to produce short chain fatty acids (SCFAs) which decrease inflammatory processes and boost the immune system. Maria Conley, Detroit Free Press, "Inflammation and your diet: What’s the connection?," 4 June 2018 On the vaccine virus, the protein can prompt the human immune system to develop protective responses against the real Ebola. Beth Mole, Ars Technica, "Vaccination method that wiped out smallpox gets unleashed today on Ebola," 21 May 2018 The panelists also heard from researchers who theorize, based in part on animal studies, that silicone that leaks from implants can trigger or exacerbate immune system disorders in certain patients. Matthew Perrone, The Seattle Times, "US experts: Too soon to pull breast implants tied to cancer," 26 Mar. 2019 Broadly, that means your skin is manifesting an immune system response to something your body thinks could harm your health. Korin Miller, SELF, "9 Questions That Will Help You Decode That Skin Rash," 22 Mar. 2019

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

Statistics for immune system

Last Updated

12 May 2019

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

using a distributed computer network

Get Word of the Day daily email!

Test Your Vocabulary

Time Traveler Quiz: Which Word Came First?

  • time traveler quiz which word came first
  • Which came first?
True or False

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

TAKE THE QUIZ
Word Winder's CrossWinder

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!