Caesium

usgb/ˈsiːziəm/
noun

A soft, silvery-gold metal that is a chemical element with the symbol Cs and atomic number 55.

Caesium is used in atomic clocks because of its precise vibrations.
Visual representation of "caesium" - A soft, silvery-gold metal that is a chemical element with the symbol Cs and atomic number 55.

Often appears as...

  • caesium chloride
  • caesium atomic clock

Usage tips

Technical

Definition 1 of 3
Visual representation of "caesium"
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Scientific Use

Caesium is commonly mentioned in scientific contexts, especially regarding its uses in technology.

Illustration for Scientific Use
The laboratory was equipped with a caesium-based spectroscopy device.
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Pronunciation

Pronounced as 'see-zee-um', it might be confused with 'cesium', which is the American spelling.

Illustration for Pronunciation
The article on atomic clocks clarified the vibrational frequency of caesium.
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Element Appearance

When learning about caesium, remember its notable softness and gold-silver color.

Illustration for Element Appearance
He marveled at the caesium's shimmering appearance under the lab lights.
Visual representation of the word "Caesium"

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