LD50 LD-50 test Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English Simple English LD50 Simple English Simple English Simple English Simple English Simple English Simple English see explanation Simple English Simple English Simple English Simple English Simple English Simple English LD50 “lethal dose, 50%.” Simple English Simple English