: a metallic chemical element that is the most electropositive element known and that is used in photoelectric cells, in atomic clocks, and as a component of drilling fluid see Chemical Elements Table
Examples of cesium in a Sentence
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To achieve very high precision, Luiten needed to find a material that could sustain electromagnetic oscillations for longer than a beam of cesium atoms can.
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IEEE Spectrum, 24 June 2021
Elevated levels of lithium, rubidium and cesium have been detected in waters associated with the historic Kings Mountain Mine, west of Charlotte, North Carolina, raising questions about the potential impact on environmental and human health.
—Tom Rogers, Newsweek, 25 Nov. 2024
Germanium semiconductor detectors, radioactive cesium concentration detectors, sodium iodide scintillation spectrometers and more scan the produce for any signs of radioactivity.
—Kate Graham-Shaw, Scientific American, 9 Oct. 2024
An array of radioactive substances had been released during the disaster, including plutonium and uranium, but scientists were also on the lookout for harmful levels of radioactive cesium and iodine isotopes, which turned out to be the abundant and far-reaching contaminants of agricultural land.
—Kate Graham-Shaw, Scientific American, 9 Oct. 2024
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IEEE Spectrum, 24 June 2021
Elevated levels of lithium, rubidium and cesium have been detected in waters associated with the historic Kings Mountain Mine, west of Charlotte, North Carolina, raising questions about the potential impact on environmental and human health.
—Tom Rogers, Newsweek, 25 Nov. 2024
Germanium semiconductor detectors, radioactive cesium concentration detectors, sodium iodide scintillation spectrometers and more scan the produce for any signs of radioactivity.
—Kate Graham-Shaw, Scientific American, 9 Oct. 2024
An array of radioactive substances had been released during the disaster, including plutonium and uranium, but scientists were also on the lookout for harmful levels of radioactive cesium and iodine isotopes, which turned out to be the abundant and far-reaching contaminants of agricultural land.
—Kate Graham-Shaw, Scientific American, 9 Oct. 2024
See All Example Sentences for cesium
Cite this Entry
“Cesium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cesium. Accessed 28 Feb. 2025.
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Medical Definition
cesium
noun
ce·si·um
variants
or chiefly British caesium
: a silver-white soft ductile element of the alkali metal group that is the most electropositive element known and that is used especially in photoelectric cells
—symbol Cs
see Chemical Elements Table
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