ˌelˌdēˈfiftē noun
Etymology: l ethal d ose
: the amount of a toxic agent (as a poison, virus, or radiation) that is sufficient to kill 50% of a population of animals usually within a certain time
ˌelˌdēˈfiftē noun
Etymology: l ethal d ose
: the amount of a toxic agent (as a poison, virus, or radiation) that is sufficient to kill 50% of a population of animals usually within a certain time
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012