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nocebo

[ noh-see-boh ]
/ noʊˈsi boʊ /
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noun
an inactive substance or a real medication that produces unpleasant or worsening symptoms in a patient or research participant because the person expects negative effects. Compare placebo (def. 1).
a negative symptom experienced by a person with such expectations.
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Origin of nocebo

1960–65; Latin nocēbō “I shall be harmful”; patterned after placebo
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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