caesium

(redirected from Element 55)
Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to Element 55: Element 66

caesium

See cesium.

ce·si·um

(Cs) (sē'zē-ŭm)
A metallic element, atomic no. 55, atomic wt. 132.90543; a member of the alkali metal group. 137Cs (half-life equal to 30.1 years) is used in treatment of certain malignancies.
Synonym(s): caesium.
[L. caesius, bluish gray]

ce·si·um

(Cs) (sē'zē-ŭm)
A metallic element used in treatment of some malignancies.
Synonym(s): caesium.
[L. caesius, bluish gray]

caesium

cesium.