http://www.thefreedictionary.com/placebo placebo dictionary placebo placebo TheFreeDictionary placebo http://www.thefreedictionary.com/placebo Placebo - definition of placebo by The Free Dictionary placebo http://www.thefreedictionary.com/placebo http://www.thefreedictionary.com/placebo placebo placebo placebo http://www.thefreedictionary.com/placebo Dummy drug placebo placebo placebo (SOURCE) placebo placebo "placebo" placebo http://www.thefreedictionary.com/placebo placebo placebo placebos placebo placebo placebo