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Lethal Dose 50

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Definition: The dose amount of poisonous or toxic substance or dose of ionizing radiation required to kill 50% of the tested population.  almost never IM; do not coord with /mortal in exper studies; DF: LD 50 or LD50    Other names LD50; Dose 50, Lethal

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Sources: NLM Medical Subject Headings, NIH UMLS, Drugs@FDA, FDA AERS original data copyright United States Government. No endorsement implied. Last modified 6/6/2012
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