Definify.com
Webster 1913 Edition
Caesium
caesium
,Cæ′si-um
(sē′zē̍-ŭm)
, Noun.
[NL., from L.
caesius
bluish gray.] (Chem.)
A rare alkaline metal found in mineral water; – so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic number 55. Atomic weight 132.6.
Syn. – cesium, Cs
Definition 2025
Caesium
caesium
caesium
English
| Chemical element | |
|---|---|
| Cs | Previous: xenon (Xe) |
| Next: barium (Ba) | |
Alternative forms
- cesium (US; see the Wikipedia article for more information)
- cæsium
Noun
caesium (uncountable)
- A metallic chemical element (symbol Cs) with an atomic number of 55.
Derived terms
Derived terms
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Related terms
Translations
a metallic chemical element
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See also
Anagrams
Latin
Pronunciation
- (Classical) IPA(key): /ˈkae̯.si.um/, [ˈkae̯.si.ũ]
Adjective
caesium
- nominative neuter singular of caesius
Noun
caesium n (genitive caesiī); second declension
Inflection
Second declension.
| Case | Singular | Plural |
|---|---|---|
| nominative | caesium | caesia |
| genitive | caesiī | caesiōrum |
| dative | caesiō | caesiīs |
| accusative | caesium | caesia |
| ablative | caesiō | caesiīs |
| vocative | caesium | caesia |