half-life

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Synonyms for half-life

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)

References in periodicals archive ?
13) Given that dopamine agonists have a halflife of several hours, decreased motor complications may be realized in patients with early PD who utilize these agents in combination as opposed to sole use of levodopa.
3] to raise vitamin D levels because it has a longer halflife than does [D.
Nigger" is used in sixteen out of twenty listed songs on the album titled Illadelph Halflife and in fourteen out of eighteen listed songs on the album titled Things Fall Apart.
With clomiphene citrate, depletion of estrogen receptors has long-term effects because of the drug's relatively long halflife (several days).
It has a short halflife (15-20 minutes), being rapidly cleared by the liver.
If, as supporters of reprocessing advocate, two fission products with a 30-year halflife, cesium-137 and strontium-90, are separated and stored on the surface, the remaining fission products from perhaps 100 times as much spent fuel could be stored in the mountain.
For a first-order process, the halflife can be calculated by the following equation:
41]Ca is a radioactive isotope, but its halflife is so long that, for all practical purposes, it behaves as a stable isotope.
There I was, concentrating on Halo 2 and Halflife 2 that I almost missed out on this gem.
He is the author of fifteen books of poetry, including Chickamauga, which won the 1996 Lenore Marshall Poetry Prize; Black Zodiac (1997), which won the Pulitzer Prize and the Los Angeles Times Book Prize; Country Music: Selected Early Poems (1983), which won the National Book Award; Zone Journals (1988); Appalachia (1998); Negative Blue (2000); The World of the Ten Thousand Things: Poems 1980-1990; and two volumes of criticism: Halflife (1988) and Quarter Notes (1995).
In the typical study patient, eszopiclone has a 5- to 7-hour halflife.