cesium

cesium
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 the treatment of certain malignancies. [L. caesius, bluish gray]

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ce·si·um or chiefly Brit cae·si·um 'sē-zē-əm n a silver-white soft ductile element of the alkali metal group that is the most electropositive element known and that is used esp. in photoelectric cells symbol Cs see ELEMENT (table)

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ce·si·um (Cs) (seґze-əm) [L. caesium, from caesius blue] a rare univalent metallic element with an alkaline oxide; atomic number 55, atomic weight 132.905.

Medical dictionary. 2011.

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Look at other dictionaries:

  • Cesium — Césium Pour les articles homonymes, voir Cs. Césium …   Wikipédia en Français

  • CÉSIUM — Le césium est l’élément chimique de numéro atomique 55 et de symbole Cs; il a été identifié pour la première fois en 1860 par Kirchhoff et Bunsen par analyse spectrale; deux raies bleues à 456 et 459,7 nm sont à l’origine de son nom (caesium :… …   Encyclopédie Universelle

  • cesium — n. the chemical element of atomic number 55. It is a univalent element, the most electropositive metal. Symbol Cs; atomic weight 132.905. IT has a melting point of 28.4[deg] C. Syn: caesium, Cs. [WordNet 1.5] …   The Collaborative International Dictionary of English

  • cesium — [sē′zē əm] n. [ModL, orig. neut. of L caesius, bluish gray (< IE base * (s)kai , bright > HOOD): so named (1860) by BUNSEN Robert Wilhelm because of the blue line seen in the spectroscope] a soft, silver white, ductile, metallic chemical… …   English World dictionary

  • cesium — CÉSIUM s.n. v cesiu. Trimis de LauraGellner, 13.09.2007. Sursa: DN …   Dicționar Român

  • cesium — also caesium, rare alkaline metal, 1861, coined by Bunsen and Kirchhoff in 1860 in Modern Latin (caesium), from L. caesius blue gray (especially of eyes), in reference to the two prominent blue lines in its spectrum, by which it was first… …   Etymology dictionary

  • Césium — Pour les articles homonymes, voir Cs. Césium Xénon ← Césium → B …   Wikipédia en Français

  • cesium — /see zee euhm/, 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. Also, caesium. [1930 35; < NL,… …   Universalium

  • Cesium — Eigenschaften …   Deutsch Wikipedia

  • cesium — cezis statusas T sritis chemija apibrėžtis Cheminis elementas. simbolis( iai) Cs atitikmenys: lot. caesium angl. cesium rus. цезий …   Chemijos terminų aiškinamasis žodynas

  • césium — cezis statusas T sritis fizika atitikmenys: angl. caesium vok. Caesium, n rus. цезий, m pranc. césium, m …   Fizikos terminų žodynas

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