1.安慰剂，安慰药（给无实际治疗需要者或试验药物时用）a substance that has no physical effects, given to patients who do not need medicine but think that they do, or used when testing new drugs
1.a substance that is not medicine but that a patient who is taking it believes is medicine, and so they get better; a substance that is not a medicine, used as a standard of comparison in testing the effectiveness of a new medicine
placebo