half-life
زبان مبدأ: انگلیسی
ترجمه به فارسی
- واژهنامه · Merriam-Webster Collegiate Dictionary half-life Pronunciation: - ˌ līf Function: noun Date: 1907 1 : 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, radioactive tracer, or pesticide) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes 2 : a period of usefulness or popularity preceding decline or obsolescence <slang usually has a short half-life >]]>