For Acute Toxicity we have terms and definitions in 2 topics. The topics are Environment and Sanitation.

The ability of a substance to cause severe biological harm or death soon after a single exposure or dose. Also, any poisonous effect resulting from a single short-term exposure to a toxic substance. (See
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A relatively short-term lethal or other adverse effect to a test organism caused by pollutants and usually defined as occurring within 4 days for fish and large invertebrates, and shorter times for smaller organisms. This is measured by a bioassay test.
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