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lethal dose
le·thal dose (plural le·thal dos·es)


noun 
Definition:
 
enough of something to kill: the amount of a drug or other substance that will cause death when administered.
See also  median lethal dose
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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