atomic clock :
- n a timepiece that derives its time scale from the vibration of atoms or molecules
News & Articles
- Atomic Clocks to Become Even More Accurate
The ultimate accessory in exact timekeeping — the atomic clock — is set to become even more precise, after ultrashort laser pulses were successfully transmitted across open air to help synchronize the "ticking" of new optical atomic clocks.
June 15, 2013 - LiveScience.com via Yahoo! News