caesium
cae-si-um
noun
A soft, silvery-white metallic chemical element, highly reactive, used in atomic clocks.
"Caesium is crucial for accurate timekeeping devices."
Thesaurus
Synonyms: Cs, atomic number 55, cesium
cae-si-um
A soft, silvery-white metallic chemical element, highly reactive, used in atomic clocks.
"Caesium is crucial for accurate timekeeping devices."
Synonyms: Cs, atomic number 55, cesium