0 a device that measures time extremely accurately using the vibrations (= fast, regular small movements) of atoms:
The most accurate type of timekeeping device is currently the atomic clock.
In 1967, when the first atomic clock was installed, nobody had in mind to launch a whole bunch of global positioning satellites that have atomic clocks.
As high-end time-keeping technologies, including atomic clocks, become cheaper, their application in sports and many other areas will grow.
Boulder, Colorado is home of the atomic clock, the country's official time source.
