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(Created page with "The time required for a biological system, such as that of a human, to eliminate, by natural processes, half of the amount of a substance (such as a radioactive material) that...")
 
 
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Source: U.S. Nuclear Regulatory Commission
 
Source: U.S. Nuclear Regulatory Commission
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[[Category: Chemistry]]

Latest revision as of 11:39, 29 May 2019

The time required for a biological system, such as that of a human, to eliminate, by natural processes, half of the amount of a substance (such as a radioactive material) that has entered it.

Source: U.S. Nuclear Regulatory Commission