LD50

noun
\ˌel-ˌdē-ˈfif-tē \

Definition of LD50 

: the amount of a toxic agent (such as a poison, virus, or radiation) that is sufficient to kill 50 percent of a population of animals usually within a certain time

First Known Use of LD50

1942, in the meaning defined above

History and Etymology for LD50

lethal dose

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Dictionary Entries near LD50

LCT

LD

ld

LD50

LDC

ldg

LDH

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The first known use of LD50 was in 1942

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LD50

noun
variants: or LD50 \ˈel-ˈdē-ˈfif-tē \

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

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