half-life
/ˈhɑːf laɪf/noun
उच्चारण हाफ़ लाइफ़
अर्धायु
Advanced word
noun
- 1
[C] physics
the time taken for half the atoms in a radioactive substance to decay
अर्धायु
- Carbon-14 has a half-life of about 5,730 years.
- Some radioactive elements have a half-life of only a few seconds.
- 2
[C] medical
the time taken for the amount of a drug or other substance in the body to fall to half
(दवा की) अर्धायु
- The drug has a short half-life, so it must be taken several times a day.