'cesium' definitions:
Definition of 'cesium'
(from WordNet)
noun
A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal [syn: cesium, caesium, Cs, atomic number 55]
Definition of 'cesium'
From: GCIDE
- cesium \cesium\ n. the chemical element of atomic number 55. It is a univalent element, the most electropositive metal. Symbol Cs; atomic weight 132.905. IT has a melting point of 28.4[deg] C.
- Syn: caesium, Cs. [WordNet 1.5]