half-life
Definition from Wiktionary, a free dictionary
[edit] English
[edit] Noun
|
Plural |
half-life (plural half-lives)
- (physics) The time required for half of the nuclei in a sample of a specific isotope to undergo radioactive decay.
- (chemistry) In a chemical reaction, the time required for the concentration of a reactant to fall from a chosen value to half that value.
- (medicine) The time it takes for a substance (drug, radioactive nuclide, or other) to lose half of its pharmacological, physiologic, or radiological activity.
- The time it takes for an idea or a fashion to lose half of its influential power.
- 1991, Robert Ackerman, Introduction to Jane Ellen Harrison's Prolegomena to the Study of Greek Religion (1903)
- Most books of scholarship have surprisingly short intellectual 'half-lives during which they make a difference"
- 1991, Robert Ackerman, Introduction to Jane Ellen Harrison's Prolegomena to the Study of Greek Religion (1903)
[edit] Translations
time in physics
|
|
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Help:How to check translations.
Translations to be checked
|
|
