sideeffect

side effect

noun
1.
any effect of a drug, chemical, or other medicine that is in addition to its intended effect, especially an effect that is harmful or unpleasant.
2.
any accompanying or consequential and usually detrimental effect: the side effects of air pollution.
Also, side-effect.


Origin:
1880–85

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
side effect
 
n
1.  Compare aftereffect any unwanted nontherapeutic effect caused by a drug
2.  any secondary effect, esp an undesirable one

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

side effect n.
A peripheral or secondary effect, especially an undesirable secondary effect of a drug or therapeutic regimen.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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