What does LD50 stand for?

Lethal Dose 50 (median concentration of a toxicant that will kill 50% of the test animals within a designated period)

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

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Samples in periodicals archive:

The unit of measure of lethality is called the lethal dose 50 or LD50.

Insect Spray Warnings and Alternatives

While acknowledging that some animal tests, such as the Lethal Dose 50 Percent (LD50) and the Maximum Tolerated Dose (MTD), may yield results that are statistically invalid and difficult to extrapolate to humans, he nevertheless concludes, "Though imperfect, in most tests the mouse ramains the best model for man.

Testing for toxins: environmental and humane groups seek alternatives ...