LD50

noun
\ ˌel-ˌdē-ˈfif-tē How to pronounce LD{inf}50{/inf} (audio) \

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

ld

LD50

LDC

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Cite this Entry

“LD50.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/LD50. Accessed 7 Aug. 2022.

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More Definitions for LD50

LD50

noun
variants: or LD50 \ ˈel-​ˈdē-​ˈfif-​tē How to pronounce LD50 (audio) \

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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