caesium

What is the opposite of caesium? Here is what we hold, with its meaning and related words.

Noun — A soft, golden, highly reactive metallic element with the symbol Cs and atomic number 55.

We haven't recorded synonyms for caesium yet. You can still read its full definition, where it comes from, or words that rhyme with it.

How to use caesium

The word patterns that sound natural to a native speaker.

caesium atom caesium metal caesium chloride caesium compound

Caesium is a technical, scientific word, and British writing normally uses this spelling.

Etymology

The word was formed in Latin-based scientific vocabulary from caesius, meaning sky-blue, with the suffix -ium used for chemical elements. The blue reference relates to the element's radiation spectra.

Full origin of caesium →

Frequently asked questions

What is caesium?

Caesium is a chemical element with the symbol Cs and atomic number 55. It is a soft, golden, highly reactive alkali metal.

Is caesium the same as cesium?

Yes. Cesium is the American spelling of the same element, while caesium is the spelling used in British English.

Why is caesium called caesium?

The name comes from the Latin word caesius, meaning sky-blue, in reference to the element's radiation spectra. The ending -ium is the usual suffix for element names.

Nearby words

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