English version


From Longman Dictionary of Contemporary Englishcesiumce‧si‧um /ˈsiːziəm/ noun [uncountable]  the American spelling of caesium
Examples from the Corpus
cesiumThe definition of a second has since officially been the time it takes a cesium atom to make 9,192,631,770 vibrations.During irradiation, food is exposed to gamma rays from sources such as cobalt 60 or cesium 137.
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