Placebo

Pronunciation

Definition 1

An inactive substance or treatment that looks the same as, and is given the same way as, an active drug or treatment being tested. The effects of the active drug or treatment are compared to the effects of the placebo. (NCI Dictionary)

Definition 2

An inactive substance, treatment or procedure that is intended to provide baseline measurements for the experimental protocol of a clinical trial. (NCI Thesaurus)

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