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placebo

pla·ce·bo /pləˈsiːbəʊ $ -boʊ/ noun (plural placebos) [countableC]  
1. MIa harmless substance given to a sick person instead of medicine, without telling them it is not real. Placebos are often used in tests in which some people take real medicine and others take a placebo, so that doctors can compare the results to see if the real medicine works properly. 安慰剂;无效对照剂〔无害物质,无药理成分,病人在不知情的情况下服用,常用于测试新药〕
2. placebo effect when someone feels better after taking a placebo, even though it has not had any effect on their body 安慰剂效应
Examples from the Corpus
Examples from the Corpus
Origin placebo
(1700-1800) Latin I shall please, from placere; → PLEASE2
pla·ce·bo noun
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