Speakur

Word Pronunciation & Dictionary

caesium

/ˈsiːzi.əm/

Word Rarity Very rare

Frequency: 2.19 in modern English

Syllables
cae-sium
IPA
/ˈsiːzi.əm/
11
Scrabble Score
7
Letters
2
Syllables
7
Unique Chars

Meaning

noun

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

Uncountable

Etymology

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

Origin

Word Breakdown

Usage

Inflected Forms

cæsium (alternative, dated) cesium (alternative, US)

Derived Forms

caesian caeside dicaesium radiocaesium tetracaesium

Phrases

caesium-137 caesium auride cesium auride caesium azide cesium azide caesium cell cesium cell caesium chloride

Frequently Paired Words

caesious lepidolite pollucite

Synonyms

cesium cs atomic number 55

Questions

How do you pronounce caesium?
The recorded pronunciation is /ˈsiːzi.əm/.
What does caesium mean?
The chemical element (symbol Cs) with an atomic number of 55. It is a soft, gold-colored, highly reactive alkali metal.
Where does caesium come from?
It is traced to Latin.

How to pronounce caesium

  1. Open the pronunciation page — Open the Speakur entry for “caesium”.
  2. Read the phonetic spelling — Read the IPA spelling (/ˈsiːzi.əm/) so you know which sounds to aim for.
  3. Play the audio — Click Play to hear reference audio for “caesium”.
  4. Repeat and practice — Say “caesium” aloud, matching stress and vowels until it feels natural.