cesium


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Related to cesium: cesium 137, Cesium chloride, Cesium clock

ce·si·um

 (sē′zē-əm)
n. Symbol Cs
A soft, silvery-white ductile, metallic element that is the most electropositive and alkaline of the elements and is used in atomic clocks and photoelectric cells and to catalyze hydrogenation of some organic compounds. The fundamental unit of time in the International System, the second, is based on the frequency of radiation between two energy states in an atom of the Cs-133 isotope. Atomic number 55; atomic weight 132.905; melting point 28.44°C; boiling point 671°C; specific gravity 1.873; valence 1. See Periodic Table.

[From Latin caesius, bluish gray (from its blue spectral lines).]

cesium

(ˈsiːzɪəm)
n
(Elements & Compounds) the usual US spelling of caesium

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]

ce·si·um

(sē′zē-əm)
Symbol Cs A soft, easily shaped, silvery-white element that is an alkali metal. It is liquid at room temperature and is the most reactive of all metals. Cesium is used to make photoelectric cells, electron tubes, and atomic clocks. Atomic number 55. See Periodic Table.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cesium - a soft silver-white ductile metallic element (liquid at normal temperatures)cesium - 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

ce·si·um

n. cesio, elemento metálico perteneciente al grupo de metales alcalinos.
References in periodicals archive ?
Operating their source at wavelengths around 852 nanometers, they used it to detect a particular energy-level transition in atomic cesium, cutting by more than half the amount of quantum noise that normally contaminates such measurements.
The move came after the Tokyo metropolitan government said it had detected high levels of radioactive cesium in beef from cattle transported from a farm in Asakawa, Fukushima Prefecture, to a slaughterhouse in Sendai, Miyagi Prefecture.
This is the first report of a buckyball superconductor that incorporates elements other than alkali metals such as cesium and potassium, Iqbal and others note.
The prefectural government took feed and water samples from the farm Sunday after radioactive cesium was found in the meat of 11 cows shipped to and processed in Tokyo.
However, the major factor behind cesium weeping, which accounts for half to two-thirds of the transit-induced removable contamination, "remains elusive," Bennett says.
With the exception of some very low California readings, all measurements of ash with fallout-cesium exceeded - some by 100 times or more - the levels of radioactive cesium that may be released from nuclear plants (about 100 picocuries per kilogram of sludge).
At that level, Buesseler stressed, the cesium in Japanese coastal waters is safe for marine life and for human exposure.
Cesium-137, the most common radioactive form of the metal cesium, is commonly used for the treatment of cancer and in a variety of gauges in the construction and drilling industries, but it can be used in nuclear weapon production as well.
Iodine was found at all 12 sites, including Seoul, while cesium was only detected in Chuncheon, 85 kilometers east of Seoul," KINS president Yun Choul-ho said at a news conference.
The first episode had occurred during intravenous cesium treatment (2,000 mg four times a day for 2 weeks), with recurrences over the ensuing 2 months when he was taking 1,000-mg cesium capsules three times daily.
Standard drilled at least a dozen holes totaling 968 metres in two targets, but the company did not assay for tantalum or cesium.
The focus on our rare metals project positions HLM in a market where demand is growing, supply is under pressure and our project is unique with both the occurrence of cesium and tantalum.