placebo /plə-sēˈbō/

1. A medicine given to humour or gratify a patient rather than to exercise any physically curative effect
2. A pharmacologically inactive substance administered as a drug either in the treatment of psychological illness or in the course of drug trials
3. Vespers for the dead (RC)
4. A sycophant (obsolete)

placebo effect noun

A beneficial effect of a placebo, ascribed to the patient's belief in its efficacy

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