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stressor

[stres-er, -awr] /ˈstrɛs ər, -ɔr/
noun
1.
an activity, event, or other stimulus that causes stress.
Origin of stressor
1950-1955
1950-55; stress + -or2
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Based on the Random House Dictionary, © Random House, Inc. 2016.
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British Dictionary definitions for stressor

stressor

/ˈstrɛsə/
noun
1.
an event, experience, etc, that causes stress
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for stressor
n.

1950, agent noun in Latin form from stress (v.).

Online Etymology Dictionary, © 2010 Douglas Harper
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8
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