Definition of placebo effect in English:

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placebo effect

Pronunciation: /pləˈsēbō əˈfekt/ /ēˈfekt/

noun

A beneficial effect, produced by a placebo drug or treatment, that cannot be attributed to the properties of the placebo itself, and must therefore be due to the patient’s belief in that treatment.
Example sentences
  • This raises the question of whether treatment causes a placebo effect, perhaps because of the extra time spent with patients.
  • The incidence also explains the powerful placebo effect of some treatments.
  • This may be attributed to a high placebo effect and the large number of poorly controlled trials in women without a pretrial diagnosis of premenstrual syndrome.

For editors and proofreaders

Syllabification: pla·ce·bo ef·fect

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