biological half-life
noun
variants
or biologic half-life
: the time that a living body requires to eliminate one half the quantity of an administered substance (as a radioisotope) through its normal channels of elimination
Cite this Entry
“Biological half-life.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/biological%20half-life. Accessed 30 Oct. 2025.
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