Half-life
Pronunciation: /ˈhæf- ˈɫaɪf/
Half-life (noun)
- The time it takes for half of a radioactive substance to break down into other materials.
- The time for the amount of a medicine in the body to fall to half of its original level.
Examples
- The half-life of the sample determines how fast it decays.
- Scientists measure half-life to estimate remaining radioactivity.