Look up: LD50

1. LD50
   The value of a given experimental variable required to cause 50% mortality.
   Found on http://life.bio.sunysb.edu/marinebio/glo
   
   
2. LD50
   Stands for lethal dose 50, an index of acute toxicity established by dosing animals (usually rats) until 50% of the test population dies. Doses may be established for oral, dermal or inhalation exposures eg LE50(concentration).
   Found on http://www.encyclo.co.uk/local/20474
   
   
3. LD50
   Lethal dose of a substance that will kill 50% of all organisms exposed to that dose.
   Found on http://www.roadsafeeurope.com/useful_inf
   
   
4. LD50
   That dose of a compound which causes death in 50% of the organisms to which it has been administered. Routine use of LD50 tests is now being replaced by more sensitive (and less wasteful) methods.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
5. LD50
   median lethal dose.
   Found on http://www.encyclo.co.uk/local/21001
   
   
6. LD50
   Median Lethal Dose. Statistically derived single dose that can be expected to cause death in 50% of dosed animals
   Found on http://www.encyclo.co.uk/local/21114
   
   
7. LD50
   n. median lethal dose; a quantity or concentration of toxin at which half of the test subjects to whom it is administered are killed by its effects
   Found on http://www.avru.org/reference/reference_