Noun
English Wikipedia has an article on:LD50Wikipedia
LD50 (plural LD50s)
(toxicology) The amount of a substance required to kill half of a given population; a measure of toxicity.
Amyl alcohol has an oral LD50 of 200 mg/kg in mice, http://www.sigmaaldrich.com/ suggesting that it is significantly more toxic than ethanol. Source: Internet
LD50 values for mice are 1 mg/kg orally, 0.100 mg/kg intravenously, 0.270 mg/kg intraperitoneally and 0.270 mg/kg subcutaneously. Source: Internet
The acute oral LD50 of FLEXERIL is approximately 338 and 425 mg/kg in mice and rats, respectively. Source: Internet
For an overview of more test animal results (LD50, LDLo and TDLo) see the following table. Source: Internet