English version

cesium

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.
Pictures of the day
Do you know what each of these is called?
Click on the pictures to check.