caesium clock

noun

A type of highly accurate atomic clock that is regulated by a resonance frequency of caesium atoms (the same frequency, 9,192,631,770 Hz, on which the precise scientific definition of the second is based).

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Meanings

nouncaesium clock (plural caesium clocks)

plural caesium clocks · alternative cesium clock

  1. A type of highly accurate atomic clock that is regulated by a resonance frequency of caesium atoms (the same frequency, 9,192,631,770 Hz, on which the precise scientific definition of the second is based).
Cite this entry
APA

caesium clock. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/caesium%20clock

MLA

“caesium clock.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/caesium%20clock. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “caesium clock,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/caesium%20clock.

Source: caesium clock on Wiktionary, CC BY-SA 4.0.