Definitions for placebo effectpləˈsi boʊ
Random House Webster's College Dictionary
pla•ce′bo effect`pləˈsi boʊ(n.)
a reaction to a placebo manifested by a lessening of symptoms or the production of anticipated side effects.
any effect that seems to be a consequence of administering a placebo; the change is usually beneficial and is assumed result from the person's faith in the treatment or preconceptions about what the experimental drug was supposed to do; pharmacologists were the first to talk about placebo effects but now the idea has been generalized to many situations having nothing to do with drugs
The tendency of any medication or treatment, even an inert or ineffective one, to exhibit results simply because the recipient believes that it will work.
U.S. National Library of Medicine
An effect usually, but not necessarily, beneficial that is attributable to an expectation that the regimen will have an effect, i.e., the effect is due to the power of suggestion.
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