Half-life (disambiguation)
Half-life is a mathematical and scientific description of exponential decay.Half-life may also refer to:
Biological half-life, pertaining to organisms (also refers to "elimination half-life", a pharmacokinetic parameter in medicine)
Half-Life, a 1998 first-person shooter computer game
Half-Life 2, its sequel, released in 2004
Halflife (comics), the name of two different Marvel comic characters
Half Life (album), the former name of an album by Eric West
Half Life (3 album), album by the band 3
Halflife (EP), an EP by Lacuna Coil
Half-Life E.P., an EP by Local H
Halflife (musical), a play by Forbes AllenHalf-Life (Hal Clement novel), a science fiction novel by
Hal ClementHalf-Life (novel), a 2004 gay youth novel by
Aaron KrachHalf Life (novel), a 2006 novel by
Shelley Jackson Half-life may also refer to:A term used for posthumous consciousness in Philip K. Dick's novel
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half life
Noun
1. 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)
(synonym) half-life
(hypernym) time period, period of time, period
half-life
Noun
1. 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)
(synonym) half life
(hypernym) time period, period of time, period
Half-life
half-life
The time required for the activity of a given radioactive species to decrease to half of its initial value due to radioactive decay. The half-life is a characteristic property of each radioactive species and is independent of its amount or condition. The effective half-life of a given isotope is the time in which the quantity in the body will decrease to half as a result of both radioactive decay and biological elimination. 1/3/73
période radioactive
Temps pendant lequel la moitié des noyaux radioactifs d'un échantillon se sont désintégrés. La période est une caractéristique propre à chacun des corps radioactifs; elle ne dépend ni de la quantité ni de l'état de ces corps. La période "effective" d'un isotope déterminé est le temps pendant lequel le nombre des noyaux présents dans le corps humain a diminué de moitié, en raison de la désintégration des noyaux et de l'élimination biologique. 1/3/73
Half-Life
1. The time required for a pollutant to lose one-half of its original coconcentrationor example, the biochemical half-life of DDT in the environment is 15 years. 2. The time required for half of the atoms of a radioactive element to undergo self-transmutation or decay (half-life of radium is 1620 years). 3. The time required for the elimination of half a total dose from the body.
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