caesium

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caesium

  • /ˈsiːzi.əm/

Where it comes from

From Latin caesius (“sky-blue”), in reference to the radiation spectra, + -ium.

noun cæsium · cesium

  1. uncountable The chemical element (symbol Cs) with an atomic number of 55. It is a soft, gold-colored, highly reactive alkali metal.

Translations

Every language

noun a metallic chemical element

Españolcesio
한국어세슘 sesyum
日本語セシウム seshiumu
中文銫 /铯 sè
हिन्दीद्युतातु dyutātu
Portuguêscésio
Françaiscésium, cæsium
DeutschCäsium, Zäsium
Italianocesio
Ελληνικάκαίσιο kaísio
Românăcesiu
Русскийце́зий cézij
Tiếng Việtxezi, xêzi
العربيةسِيزِيُوم sīziyūm
עבריתצסיום tsesyum, צזיום tsezyum

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Cite this
MLA

"caesium." Wiktionary, via Micwyn, micwyn.com/word/caesium. Accessed 6 Nov. 2026.

APA

caesium. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/caesium

Chicago

"caesium." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/caesium.

BibTeX
@misc{caesium_2026,
  title = {caesium},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/caesium},
  urldate = {2026-11-06}
}