名詞 cesium:

1. a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
   同義詞：caesium, Cs, atomic number 55

cesium 也作 cae.si.um

n.Symbol Cs （名詞）符號 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
銫：一種質地柔軟的銀白色韌性金屬，室溫時為液體，為最具正電性與堿性的元素，用作光電池和某些有機化合物氫化作用的催化劑。原子序數(shù)55；原子量32.905；熔點28.5=C；沸點=C；比重.87；化合價參見 element

來源：
From Latin caesius [bluish gray (from its blue spectral lines)]
源自 拉丁語 caesius [蘭灰色（得名于藍色光譜線）]