reactivity
noun
re·ac·tiv·i·ty
(ˌ)rē-ˌak-ˈti-və-tē 
: 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
Matt RidleyAbnormal 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
Bradford J. ShingletonExamples of reactivity in a Sentence
Recent Examples on the Web
However, these reactions would only feed the narcissist’s desire for reactivity.
—Mark Travers, Forbes, 28 Feb. 2024
Plus, the fabric is designed to increase the reactivity of your muscles.
—Sarah Bradley, Verywell Health, 5 Feb. 2024
For You Chickens raised near cats can develop antibodies against the protein Fel d 1, which is found in cat saliva and is responsible for 90% of the reactivity in people who are allergic to cats.
—Stephanie Brown, Verywell Health, 17 Nov. 2023
Early player reviews of the game have noted a few quest-blocking bugs but also a mind-boggling amount of reactivity to the world, the NPCs, and the quest design.
—Kevin Purdy, Ars Technica, 21 Oct. 2023
Chickens raised near cats develop an antibody to Fel d 1, the protein in cat saliva that is responsible for up to 90% of the reactivity in people who are allergic to cats.
—Stephanie Brown, Verywell Health, 17 Nov. 2023
Voltages were applied to the chip to create outgoing currents in each material in order to indicate reactivity.
—IEEE Spectrum, 30 Oct. 2023
Fernández-Castañeda and colleagues also had the rare opportunity to study microglial cell reactivity in human samples.
—William A. Haseltine, Forbes, 1 Aug. 2022
With this reduced reactivity while on a psychedelic, a patient may be able to reprocess traumatic events without these sensations of fear.
—Jennifer Chesak, Verywell Health, 12 Oct. 2023
Mark Travers, Forbes, 28 Feb. 2024
Plus, the fabric is designed to increase the reactivity of your muscles.
—Sarah Bradley, Verywell Health, 5 Feb. 2024
For You Chickens raised near cats can develop antibodies against the protein Fel d 1, which is found in cat saliva and is responsible for 90% of the reactivity in people who are allergic to cats.
—Stephanie Brown, Verywell Health, 17 Nov. 2023
Early player reviews of the game have noted a few quest-blocking bugs but also a mind-boggling amount of reactivity to the world, the NPCs, and the quest design.
—Kevin Purdy, Ars Technica, 21 Oct. 2023
Chickens raised near cats develop an antibody to Fel d 1, the protein in cat saliva that is responsible for up to 90% of the reactivity in people who are allergic to cats.
—Stephanie Brown, Verywell Health, 17 Nov. 2023
Voltages were applied to the chip to create outgoing currents in each material in order to indicate reactivity.
—IEEE Spectrum, 30 Oct. 2023
Fernández-Castañeda and colleagues also had the rare opportunity to study microglial cell reactivity in human samples.
—William A. Haseltine, Forbes, 1 Aug. 2022
With this reduced reactivity while on a psychedelic, a patient may be able to reprocess traumatic events without these sensations of fear.
—Jennifer Chesak, Verywell Health, 12 Oct. 2023
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'reactivity.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near reactivity
Cite this Entry
“Reactivity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/reactivity. Accessed 24 Apr. 2024.
Copy CitationMedical Definition
reactivity
noun
re·ac·tiv·i·ty
(ˌ)rē-ˌak-ˈtiv-ət-ē
plural reactivities
: the quality or state of being reactive
skin reactivity
emotional reactivity
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