- cesium
- 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 element, one of the alkali metals and the most electropositive of all the elements: it ignites in air, reacts vigorously with water, and is used in photoelectric cells: symbol, Cs; at. no., 55: a radioactive isotope (cesium-137) with a half-life of 30.17 years is a fission product and is used in cancer research, radiation therapy, etc.: see the periodic table of elements in the Reference Supplement
English World dictionary. V. Neufeldt. 2014.
См. также в других словарях:
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 — 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
