transcription, транскрипция: [ ˌel-ˌdē-ˈfif-tē ]
noun
Etymology: l ethal d ose
Date: 1942
: 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
transcription, транскрипция: [ ˌel-ˌdē-ˈfif-tē ]
noun
Etymology: l ethal d ose
Date: 1942
: 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
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003