: reaction of one antigen with antibodies developed against another antigen

Examples of cross-reaction in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
However, officials fear that a cross-reaction of both influenza viruses in the body can cause bird flu to mutate to spread more easily or cause serious illness. — Anthony Robledo, USA TODAY, 15 Oct. 2024

Word History

First Known Use

1946, in the meaning defined above

Time Traveler
The first known use of cross-reaction was in 1946

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Cite this Entry

“Cross-reaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cross-reaction. Accessed 26 Sep. 2026.

Medical Definition

cross-reaction

noun
: reaction of one antigen with antibodies developed against another antigen
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