โ™ป๏ธap environmental science review

LD50

Written by the Fiveable Content Team โ€ข Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 examโ€ขWritten by the Fiveable Content Team โ€ข Last updated August 2025

Definition

LD50 stands for "lethal dose 50" and refers to the amount of a substance that is estimated to be lethal to 50% of the test population. It is commonly used in toxicology studies to determine the toxicity level of a substance.

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