nocebo, noun
A harmless substance that that causes harmful effects because the person taking/using it expects to be harmed. Similar to placebo, except that with a nocebo a person expects to be harmed as opposed to healed/helped with a placebo. Apparently nocebo effects, are quite common, so think positive!


I met this word in a Straight Dope column.
(http://www.straightdope.com/columns/001229.html)

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