| 单词 | placebo |
| 释义 | placebo /pleuh see"boh/ for 1; /plah chay"boh/ for 2, n. , pl. placebos, placeboes. 1. Med. , Pharm. a. a substance having no pharmacological effect but given merely to satisfy a patient who supposes it to be a medicine. b. a substance having no pharmacological effect but administered as a control in testing experimentally or clinically the efficacy of a biologically active preparation. 2. 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. [1175-1225 for def. 2; 1775-85 for def. 1; ME < L placebo I shall be pleasing, acceptable] |
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