Medical Dictionary

biological half–life

noun

Medical Definition of BIOLOGICAL 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

Variants of BIOLOGICAL HALF-LIFE

biological half–life or biologic half–life

Browse

How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears