Cs

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a soft silver-white ductile metallic element (liquid at normal temperatures);
the most electropositive and alkaline metal
• Syn:
cesium, caesium, atomic number 55
• Hypernyms:
metallic element, metal
• Hyponyms:
cesium 137
• Substance Holonyms:
pollucite