zeptoseconds
/ˈzɛptoʊˌsɛkəndz/
noun
- A unit of time equal to one sextillionth (10⁻²¹) of a second, used in physics to measure extremely fast processes.
- The new experiment recorded events lasting just a few zeptoseconds.
- A zeptosecond is so short that light travels only a tiny fraction of an atom's width in that time.
- Scientists measured the movement of particles in zeptoseconds.