half-life
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/hˈæf lˈaɪf/
British pronunciation
/hˈɑːf lˈaɪf/
halflife
half life

Definition & Meaning of "half-life"

Half-life
01

the time required for half of a quantity of a substance to undergo a change or decay, typically in the context of radioactive decay or chemical reactions

example
Example
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The half-life of a radioactive isotope determines the time it takes for half of the initial amount to decay into a stable product.
Carbon-14, with a half-life of around 5,730 years, is used in radiocarbon dating to estimate the age of archaeological artifacts.
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