ammonia clock
 

* 1.an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule

English Related Words* 12 hour clock

* 12-hour clock

* 24 hour clock

* 24-hour clock

* against the clock

* alarm clock

* aldehyde ammonia

* ammonia

* ammonia alum

* ammonia canister

* ammonia dynamite (commercial)

* ammonia hidroxide

* ammonia nitrogen

* ammonia soda

* ammonia soda process