median lethal concentration
Also found in: Dictionary, Encyclopedia.
Related to median lethal concentration: LC50
median lethal concentrationThe average concentration of a chemical or mixture in air as a gas, vapour, mist, fume or dust capable of killing 1/2 of the test animals exposed by inhalation under specific conditions. Median lethal concentration (LC50) is often expressed in ppm or mg/m3.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.