AMMONIA CLOCK

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

An atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule

Classified under:

Nouns denoting man-made objects

Hypernyms ("ammonia clock" is a kind of...):

atomic clock (a timepiece that derives its time scale from the vibration of atoms or molecules)

Credits

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