atomic number 27

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a hard ferromagnetic silver-white bivalent or trivalent metallic element;
a trace element in plant and animal nutrition
• Syn:
cobalt, Co
• Hypernyms:
metallic element, metal
• Hyponyms:
cobalt 60
• Substance Holonyms:
smaltite, cobaltite