| 释义 |
caesiumenUK
cae·si·um C0016700 (sē′zē-əm)n. Chiefly British Variant of cesium.caesium (ˈsiːzɪəm) or cesiumn (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°Cce•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] Thesaurus| Noun | 1. |  caesium - a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metalatomic number 55, cesium, Csmetal, 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 therapypollucite - a rare mineral that is an important source of cesium |
TranslationscaesiumenUK
caesium (US), cesium 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 caesiumenUK
ce·si·um (Cs) (sē'zē-ŭm) A metallic element, atomic no. 55, atomic wt. 132.90543; a member of the alkali metal group. 137Cs (half-life equal to 30.1 years) is used in treatment of certain malignancies.
Synonym(s): caesium. [L. caesius, bluish gray]ce·si·um (Cs) (sē'zē-ŭm) A metallic element used in treatment of some malignancies.
Synonym(s): caesium. [L. caesius, bluish gray]FinancialSeeCScaesiumenUK
Related to caesium: caesium 137Synonyms for caesiumnoun a soft silver-white ductile metallic element (liquid at normal temperatures)SynonymsRelated Words- metal
- metallic element
- cesium 137
- pollucite
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