The Radiation Dose Required To Produce Death In One-half Of The Exposed Subject Animals Is Termed The What?

Lethality
acute lethality
Lethality dose- LD
When comparing the effects of various types or circumstances, that dose which is lethal to 50% of a given population is a very useful parameter. The term is usually defined for a specific time, being limited, generally, to studies of acute lethality.