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Ammonia Clock

Definition of the noun ammonia clock

What does ammonia clock mean as a name of something?


  1. an atomic clock based on vibrational frequency of the nitrogen atom in the ammonia molecule
    • lexical domain: Artifacts - nouns denoting man-made objects
    • more generic term: atomic clock = a timepiece that derives its time scale from the vibration of atoms or molecules

Printed dictionaries and other books with definitions for Ammonia Clock

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Google previewAcademic Press Dictionary of Science and Technology (1992)

by Christopher G. Morris, Academic Press

ammonia clock ammonium gluconate ammonia Clock Horology, a type of atomic clock in which a maser separates ammonia molecules into two energy states; as the molecules fall into a lower energy state, they oscillate at a constant ...

Google previewDictionary of Phhysics

Ammonia Clock.

Google previewA Dictionary of Chemistry (2016)

by Richard Rennie, Jonathan Law

See AMMONIA CLOCK; CAESIUM CLOCK. atomic. emission. spectroscopy. (AES). An analytical technique in which a sample is ...

Google previewA Dictionary of Science (2010)

by Elizabeth A. Martin

ammonia clock A form ofatomic clock in which the frequency of ...

Google previewVan Nostrand’s Scientific Encyclopedia (2013)

by Douglas M. Considine, Glenn D. Considine

The first atomic clock was the ammonia clock invented at the United States National Bureau of ...

Google previewEncyclopedia of Time (2013)

by Samuel L. Macey

The first ammonia clock was built by Harold Lyons of the National Bureau Of Standards (USA) in the late 19405. It was rapidly superseded by the cesium- beam resonator (L. Essen and V.L. Parry of the British National Physical Laboratory, ...

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