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cesium

ce·si·um (cae·si·um)

cesium (caesium)

 
pronunciation:
si zi m
features:
Word Combinations (noun)
part of speech: noun
definition 1: a highly reactive chemical element of the alkali metal group that has fifty-five protons in each nucleus and that occurs in pure form as a soft, silvery metal melting to a heavy liquid just above room temperature. (symbol: Cs)
definition 2: a salt compound of cesium and chlorine used in medicine and research as a high-density purification agent; cesium chloride.
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