| 单词 | median lethal dose |
| 释义 | median lethal dose in British English or mean lethal dose noun Abbreviation: LD501. the amount of a drug or other substance that, when administered to a group of experimental animals, will kill 50 per cent of the group in a specified time 2. the amount of ionizing radiation that will kill 50 per cent of a population in a specified time |
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