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mean lethal dose
biol.	dose létale moyenne (50%); D.L. 50; DL 50; D.L. 50/t; DLM; dose demi-létale; dose semi-létale
med.	dose létale 50%; dose létale 50 pour cent; dose létale moyenne; dose létale médiane; dose léthale cinquante pour cent; dose léthale moyenne; dose léthale médiane; dose mortelle médiane
English thesaurus
mean lethal dose
mil., logist.	The amount of nuclear irradiation of the whole body which would be fatal to 50% of the exposed personnel in a given period of time. 2. The dose of chemical agent that would kill 50% of exposed, unprotected and untreated personnel. (FRA)