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Related to LD50: LC50
median lethal doseThe average amount of a drug, toxin, chemical substance/mixture or microorganism capable of killing 1/2 of the test animals exposed under specific test conditions. Median lethal dose (LD50) is commonly expressed in mg/kg, by oral intake or skin exposure.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
LD50Lethal dose50, median lethal dose The radiation dose that is lethal to 50% of those exposed–2.5-6.0 Gy, assuming that optimal care—ie transfusions, trauma and nursing care, antibiotics and nutrition—is available
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
In pharmacology, a dose that proves lethal to 50% of a given population.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
LD50The dose of a poison that kills half the subjects exposed to it. Used as a measure of the toxicity of drugs and other substances.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
LD50see LETHAL DOSE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
Dosage of drug or numbers of microorganisms or other pathogens that kills 50% of a test population.
Medical Dictionary for the Dental Professions © Farlex 2012