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atomic clock

DEFINITIONS OF: atomic clock

1

n a timepiece that derives its time scale from the vibration of atoms or molecules

Types:
ammonia clock
an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule
caesium clock
an atomic clock based on the energy difference between two states of the caesium nucleus in a magnetic field
Type of:
horologe, timekeeper, timepiece
a measuring instrument or device for keeping time
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