median lethal time
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Related to median lethal time: Median lethal dose
median lethal time[′mē·dē·ən ′lēth·əl ‚tīm]
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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.