caesium

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Related to Element 55: Element 66

cae·si·um

 (sē′zē-əm)
n. Chiefly British
Variant of cesium.

caesium

(ˈsiːzɪəm) or

cesium

n
(Elements & Compounds) a ductile silvery-white element of the alkali metal group that is the most electropositive metal. It occurs in pollucite and lepidolite and is used in photocells. The radioisotope caesium-137, with a half-life of 30.2 years, is used in radiotherapy. Symbol: Cs; atomic no: 55; atomic wt: 132.90543; valency: 1; relative density: 1.873; melting pt: 28.39±0.01°C; boiling pt: 671°C

ce•si•um

(ˈsi zi əm)

n.
a rare highly reactive soft metallic element of the alkali metal group used chiefly in photoelectric cells. Symbol: Cs; at. wt.: 132.905; at. no.: 55; sp. gr.: 1.9 at 20°C; melts at 28.5°C.
[1861; < Latin caesium, neuter of caesius bluish gray (see -ium2); so named from the blue lines in its spectrum]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.caesium - a soft silver-white ductile metallic element (liquid at normal temperatures)caesium - a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
cesium 137 - a radioactive isotope of cesium used in radiation therapy
pollucite - a rare mineral that is an important source of cesium
Translations
цезий
cesium
cæsium
tseesium
cesium
צזיום
cezij
cézium
sesín
セシウム
caesium
cezis
cesium
cez
cesiu
cézium
cezij
cesium
sezyum

caesium

cesium (US) [ˈsiːzɪəm] Ncesio m

caesium

, (US) cesium
nCäsium nt, → Zäsium nt