stressor

noun

stress·​or ˈstre-sər How to pronounce stressor (audio) -ˌsȯr How to pronounce stressor (audio)
: a stimulus that causes stress

Examples of stressor in a Sentence

Credit card debt is a major stressor in her life.
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.
According to the statement, radiation and microgravity were likely the chief stressors on the HSPCs, which were made up of four sets sent on SpaceX commercial resupply missions to the orbiting complex aboard the company's Dragon spacecraft. Elizabeth Howell, Space.com, 17 Sep. 2025 Endophytes enable plants to respond quickly to such stressors by expanding their genetic repertoire, according to a review by ecologist Christine Hawkes and colleagues. Anna Marija Helt, JSTOR Daily, 17 Sep. 2025 Calf mortality rates naturally run around 50 percent in the first year, but environmental stressors have worsened these already difficult odds. Adeola Adeosun, MSNBC Newsweek, 16 Sep. 2025 As the team of scientists explained in their recent publication, variations in this index can reveal the influence of environmental stressors, disease, or pollutants. Melissa Cristina Márquez, Forbes.com, 16 Sep. 2025 See All Example Sentences for stressor

Word History

First Known Use

1950, in the meaning defined above

Time Traveler
The first known use of stressor was in 1950

Browse Nearby Words

Cite this Entry

“Stressor.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/stressor. Accessed 18 Sep. 2025.

Medical Definition

stressor

noun
stress·​or ˈstres-ər How to pronounce stressor (audio) -ˌȯ(ə)r How to pronounce stressor (audio)
: a stimulus that causes stress
psychological stressors
Last Updated: - Updated example sentences
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