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lethal dose

British

noun

LD. the amount of a drug or other agent that if administered to an animal or human will prove fatal See also median lethal dose

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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The laws proposed at Westminster, Holyrood and Tynwald - Isle of Man - all state that death must be by self-administration, which usually means the individual swallowing a lethal dose.

From BBC • Feb. 26, 2026

“We take a different approach where we try to identify the person who furnished the lethal dose and hold them accountable.”

From Los Angeles Times • Mar. 12, 2025

In 2021, another beloved Central Park owl, Barry, was fatally struck by a truck after ingesting a lethal dose of rat poison that may have impaired her flying.

From Seattle Times • Feb. 1, 2024

In toxicology, the median lethal dose, or LD50, is the approximate dose required to kill half the animals in a population being studied.

From Salon • Jul. 26, 2023

The amount used on California farms alone could, according to one medical authority, “provide a lethal dose for 5 to 10 times the whole world’s population.”

From "Silent Spring" by Rachel Carson

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023