Definition of placebo in English:

placebo

Syllabification: pla·ce·bo
Pronunciation: /pləˈsēbō
 
/

noun (plural placebos)

1A harmless pill, medicine, or procedure prescribed more for the psychological benefit to the patient than for any physiological effect: his Aunt Beatrice had been kept alive on sympathy and placebos for thirty years [as modifier]: placebo drugs
More example sentences
  • According to the report published in the British Medical Journal, 60 percent of medical professionals prescribe placebos to their patients.
  • According to a new study by Israeli researchers, most doctors prescribe placebos to their patients, and in most of these cases, the patients are told they are receiving real medication.
  • And, if some patients benefit from placebos, and they are not harmed, I guess I can live with that.
1.1A substance that has no therapeutic effect, used as a control in testing new drugs.
More example sentences
  • All placebo controlled trials were positive and all comparative trials indicated equivalence with other active therapies.
  • That one doesn't get answered as often as it should, because the FDA generally only requires testing against placebo.
  • The practice of testing new medicines against placebo, rather than against the best treatment available, has contributed to a general lack of knowledge.
1.2A measure designed merely to calm or please someone.
More example sentences
  • It's interesting that the broken crosswalk buttons were not originally designed to act as placebos (presumably).
  • The stock markets, leisure travel, and all the other industries affected are relying on the sum of all these measures, including the placebos, to recover.
  • There is some debate as to whether an argon suit inflation system keeps you warm, or merely acts as a placebo i.e. making you believe that you're warmer!

Origin

late 18th century: from Latin, literally 'I shall please', from placere 'to please'.

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Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected