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单词 placebo
释义

WordReference Random House Learner's Dictionary of American English © 2024
pla•ce•bo /pləˈsiboʊ/USA pronunciation   n. [countable], pl. -bos, -boes. 
  1. Medicine, Drugs
    • , Medicinea substance that is not medicine but is given to a patient who supposes it to be a medicine, either to appease a patient or as a control in an experiment.
See -plac-.
WordReference Random House Unabridged Dictionary of American English © 2024
pla•ce•bo  (plə sēfor 1; plä chāfor 2),USA pronunciation n., pl. -bos, -boes. 
  1. Medicine, Drugs
    • a substance having no pharmacological effect but given merely to satisfy a patient who supposes it to be a medicine.
    • a substance having no pharmacological effect but administered as a control in testing experimentally or clinically the efficacy of a biologically active preparation.
  2. Religion[Rom. Cath. Ch.]the vespers of the office for the dead: so called from the initial word of the first antiphon, taken from Psalm 114:9 of the Vulgate.
  • Latin placēbō I shall be pleasing, acceptable
  • 1175–1225 for def. 2; 1775–85 for def. 1; Middle English

Collins Concise English Dictionary © HarperCollins Publishers::
placebo /pləˈsiːbəʊ/ n ( pl -bos, -boes)
  1. an inactive substance or other sham form of therapy administered to a patient usually to compare its effects with those of a real drug or treatment, but sometimes for the psychological benefit to the patient through his believing he is receiving treatment
  2. something said or done to please or humour another
  3. a traditional name for the vespers of the office for the dead
Etymology: 13th Century (in the ecclesiastical sense): from Latin Placebo Domino I shall please the Lord (from the opening of the office for the dead); C19 (in the medical sense)
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更新时间:2025/7/24 21:23:42