reactivity

noun

re·​ac·​tiv·​i·​ty (ˌ)rē-ˌak-ˈti-və-tē How to pronounce reactivity (audio)
: the quality or state of being reactive
emotional reactivity
chemical reactivity
If the brain, responding to psychological stress, stimulates the release of cortisol and cortisol suppresses the reactivity of the immune system, then a dormant viral infection may well flare up, or a new one catch hold.Matt Ridley
Abnormal reactivity to light and abnormal pupillary size may be important clues to the presence of cranial injury in the setting of head trauma.Bradford J. Shingleton

Examples of reactivity in a Sentence

Recent Examples on the Web
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Leaders who embrace this mindset can process complex challenges more effectively, reduce emotional reactivity, and uncover better solutions. Scott Hutcheson, Forbes, 8 Jan. 2025 Last May, the first International Conference on Iron Sulfide Reactions in Concrete included presentations on testing for pyrrhotite, understanding its reactivity, and mapping the mineral. The Editors, JSTOR Daily, 31 Dec. 2024 Our imaginations now roam in a rich space of hypothetical reactivity. Joshua Rothman, The New Yorker, 10 Dec. 2024 Neuroticism, characterized by emotional instability and high reactivity, is a key driver of divorce for many couples. Mark Travers, Forbes, 19 Oct. 2024 See all Example Sentences for reactivity 

Word History

First Known Use

1832, in the meaning defined above

Time Traveler
The first known use of reactivity was in 1832

Dictionary Entries Near reactivity

Cite this Entry

“Reactivity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reactivity. Accessed 20 Jan. 2025.

Medical Definition

reactivity

noun
re·​ac·​tiv·​i·​ty (ˌ)rē-ˌak-ˈtiv-ət-ē How to pronounce reactivity (audio)
plural reactivities
: the quality or state of being reactive
skin reactivity
emotional reactivity
Last Updated: - Updated example sentences
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