A very precise battery powered timepiece.
I bought an atomic clock form Sharper Image.
by blood January 26, 2005
1 more definition
An ATOMIC CLOCK is a device that is the same fucking thing as any type of timer that has ever existed. The same thing that is on a nuclear submarine is also on your wristwatch.
Holy shit that scathawk just shit an ATOMIC CLOCK!
by thehawksfriend May 28, 2010