[′mē·dē·ən ′lēth·əl ‚tīm] (microbiology) The period of time required for 50% of a large group of organisms to die following a specific dose of an injurious agent, such as a drug or radiation.
median lethal time
median lethal time
The time required for half of a population to die after exposure to ionizing radiation.See also: timeLegalSeeTimeAcronymsSeeMLT