immune system
noun
: 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
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The researchers now plan to expand on their findings, looking at the long-term effects of high fructose consumption on the immune system.
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New Atlas, 27 June 2025
Antigens are the molecules in vaccines that trigger a response from the immune system, training it to identify the specific pathogen.
—Jake Scott, The Conversation, 26 June 2025
Today, children under age 2 get vaccines against 15 diseases—but those vaccines target just 180 antigens, asking much less of the immune system.
—ArsTechnica, 25 June 2025
In turn, the mast cells release their torrent of chemical signals, setting off a cascade of immune system processes.
—Kate Raphael, Discover Magazine, 23 June 2025
See All Example Sentences for immune system
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New Atlas, 27 June 2025
Antigens are the molecules in vaccines that trigger a response from the immune system, training it to identify the specific pathogen.
—Jake Scott, The Conversation, 26 June 2025
Today, children under age 2 get vaccines against 15 diseases—but those vaccines target just 180 antigens, asking much less of the immune system.
—ArsTechnica, 25 June 2025
In turn, the mast cells release their torrent of chemical signals, setting off a cascade of immune system processes.
—Kate Raphael, Discover Magazine, 23 June 2025
See All Example Sentences for immune system
Cite this Entry
“Immune system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immune%20system. Accessed 5 Jul. 2025.
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