Meaning of HALF LIFE
| Pronunciation: | | haf lIf
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 WordNet Dictionary |
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| | Definition: | |
- [n] the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
- [n] the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)
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| | Synonyms: | | half life, half-life |
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| | See Also: | | period, period of time, time period | |
| Products Dictionary |
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| | Definition: | |  Halflife
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| Biology Dictionary |
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- The time it takes one half of a given material (such as a radioactive isotope or a pesticide) to decay or disappear.
- The period of time required for half of the quantity of a radioactive substance to decay, to transform into a different substance (which may also be radioactive), to disintegrate, or to be eliminated from a biological system or ecological system.
- The period of time required for half of the reactants involved in a chemical reaction to turn into products or be otherwise affected by the reaction.
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| Glossary |
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| | Definition: | | the time taken for half the quantity of a radioactive isotope in a sample to decay (see also radioactive decay). |
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| Thesaurus Terms |
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| | Related Terms: | | activity, artificial radioactivity, contamination, curiage, decontamination, fallout, natural radioactivity, nuclear radiation, radiant energy, radiation, radioactive radiation, radioactivity, radiocarbon dating, radiolucency, radiopacity, radiosensibility, radiosensitivity, saturation point, specific activity |
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