Medical Dictionary

half-life

2 ENTRIES FOUND:

half–life

noun \-ˌlīf\

Definition of HALF-LIFE

:  the time required for half of something to undergo a process: as a :  the time required for half of the atoms of a radioactive substance to become disintegrated b :  the time required for half the amount of a substance (as a drug or radioactive tracer) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes <the serum half–life is about 2 days—Journal of the American Medical Association>
March 02, 2015
chatoyant Hear it
Having a changeable luster or color
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