First Known Use: 1942
Dictionary
LD50
noun \ˌel-ˌdē-ˈfif-tē\
Definition of LD50
: the amount of a toxic agent (as a poison, virus, or radiation) that is sufficient to kill 50 percent of a population of animals usually within a certain time
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Origin of LD50
lethal dose
Rhymes with LD50
Medical Dictionary
LD50
noun
Medical Definition of LD50
: the amount of a toxic agent (as a poison, virus, or radiation) that is sufficient to kill 50 percent of a population of animals usually within a certain time—called also median lethal dose
Variants of LD50
LD50 or LD50 \ˈel-ˈdē-ˈfif-tē\
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