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bn:00003550n
Noun Concept
EN
ammonia clock
EN
An atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule WordNet 3.0
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Sources
EN
An atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule WordNet 3.0 & Open English WordNet
IS A
atomic clock
WordNet 3.0 & Open English WordNet
EN
ammonia clock

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