cesium 也作 cae.si.um
n.Symbol Cs （名词）符号 Cs A soft, silvery-white ductile metal, liquid at room temperature, the most electropositive and alkaline of the elements, used in photoelectric cells and to catalyze hydrogenation of some organic compounds. Atomic number 55; atomic weight 32.905; melting point 28.5=C; boiling point '90=C; specific gravity .87; valence .See table at element 铯：一种质地柔软的银白色韧性金属，室温时为液体，为最具正电性与碱性的元素，用作光电池和某些有机化合物氢化作用的催化剂。原子序数55；原子量32.905；熔点28.5=C；沸点=C；比重.87；化合价参见 element
来源：From Latin caesius [bluish gray (from its blue spectral lines)] 源自 拉丁语 caesius [兰灰色（得名于蓝色光谱线）]
