side effect

noun

Definition of side effect

: a secondary and usually adverse effect (as of a drug) toxic side effects

called also side reaction

Examples of side effect in a Sentence

Nausea and diarrhea are the side effects of the drug. the harmful side effects of using chemicals to kill insects The merger created positive side effects for both companies.
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Recent Examples on the Web

But there's a negative side effect that comes from viewers who use the open call for feedback as an invitation to share their darkest thoughts, and the problem is growing. De Elizabeth, Glamour, "For The Bachelor Contestants, Is Finding Love and Spon-Con Deals Worth the Trolls?," 9 May 2019 Oprea notes that those with bcak issues and/or diastasis recti (separation of the abs, which is a common side effect of pregnancy) should probably skip the sit-ups, says Oprea. Jenny Mccoy, SELF, "This 4-Move Workout Works Your Whole Body—and All You Need Is a Step," 19 Apr. 2019 These types of side effects weren’t more common in CR dieters overall, but several people had to pull out of the study because of safety concerns. Mark Barna, Discover Magazine, "Not So Fast," 24 Sep. 2018 The discretion is a side effect of what many would consider a dream gig. David Ferry, San Francisco Chronicle, "Food critic Rachel Levin contemplates close encounters of the animal kind," 7 June 2018 Neuronal structures became visible through a staining process Golgi devised that enabled histologists to map cells; at first, the dendrite spines were thought to be a side effect of the stain. Cate Mcquaid, BostonGlobe.com, "A different sort of scan in ‘The Beautiful Brain’," 6 June 2018 But there’s something new here too: the (hopefully temporary) loss of control over one’s bodily functions is a side effect of having given birth (both Wong and her friend are new mothers). Vogue, "Ali Wong: Hard Knock Wife," 11 May 2018 Rather, trans women who take medication to lower their testosterone levels often face side effects like dehydration, sluggishness and reduced stamina - which can all spell disaster for marathon training. CBS News, "Boston Marathon, other races say trans women can compete as women," 9 Apr. 2018 Rather, transgender women who take medication to lower their testosterone levels often face side effects like dehydration, sluggishness, and reduced stamina – which can all spell disaster for marathon training. Collin Binkley, The Christian Science Monitor, "Transgender athletes compete at Boston, other marathons," 9 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'side effect.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of side effect

1814, in the meaning defined above

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Statistics for side effect

Last Updated

23 May 2019

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Time Traveler for side effect

The first known use of side effect was in 1814

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More Definitions for side effect

side effect

noun

English Language Learners Definition of side effect

: an often harmful and unwanted effect of a drug or chemical that occurs along with the desired effect
: a result of an action that is not expected or intended

side effect

noun

Medical Definition of side effect

: a secondary and usually adverse effect (as of a drug) toxic side effects a side effect of drowsiness caused by antihistamines

called also side reaction

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More from Merriam-Webster on side effect

Rhyming Dictionary: Words that rhyme with side effect

Spanish Central: Translation of side effect

Nglish: Translation of side effect for Spanish Speakers

Britannica English: Translation of side effect for Arabic Speakers

Britannica.com: Encyclopedia article about side effect

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