half-life
suomi-englanti sanakirjahalf-life englannista suomeksi
puoliintumisaika
Substantiivi
half-life englanniksi
The time required for half the nuclei in a sample of an isotope to undergo decay.
In a chemical reaction, the time required for the concentration of a reactant to fall from a chosen value to half that value.
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"