Medical Dictionary

placebo

noun pla·ce·bo \plə-ˈsē-(ˌ)bō\
plural pla·ce·bos

Medical Definition of PLACEBO

1
:  a usually pharmacologically inert preparation prescribed more for the mental relief of the patient than for its actual effect on a disorder
2
:  an inert or innocuous substance used especially in controlled experiments testing the efficacy of another substance (as a drug)

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