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Definitions

placebo

[pluh-see-boh, plah-chey-boh] / pləˈsi boʊ, plɑˈtʃeɪ boʊ /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Among workers who took melatonin, urinary 8-OHdG levels were 80% higher during daytime sleep compared with those who took the placebo.

From Science Daily • May 30, 2026

Participants received monthly injections of ION224 at different doses or a placebo over a 51 week period.

From Science Daily • May 27, 2026

That reduction was not seen after the placebo drink, and it was not observed in the younger adults.

From Science Daily • May 25, 2026

One such trial, MND-SMART, sees several drugs tested at the same time as opposed to one group given a treatment and another a placebo.

From BBC • May 22, 2026

As it happens, Denis Papin, who had qualified as a doctor, was the first to describe the placebo and the placebo effect, in a letter to Leibniz, 11 or 12 August 1704.

From "The Invention of Science" by David Wootton




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