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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All of the additional subclasses will change the way players engage with the game, with the Oathbreaker Knight getting unique voice lines and reactivity for Oathbreakers. Yaakov Katz, Newsweek, 28 Nov. 2024 Despite their distinct appearances, both sides are exactly the same in terms of function and reactivity with food. Darcy Lenz, Southern Living, 21 Nov. 2024 Researchers tested seven particles as potential atmospheric aerosols and ranked their suitability based on their heat absorption, reactivity and reflectivity. Devika Rao, theweek, 12 Nov. 2024 Kross has even shown in his research that this simple strategy reduces emotional reactivity within milliseconds. Kevin Kruse, Forbes, 5 Nov. 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 17 Dec. 2024.

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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