atomic number 22

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts);
the main sources are rutile and ilmenite
• Syn:
titanium, Ti
• Topics:
airplane, aeroplane, plane
• Hypernyms:
metallic element, metal
• Substance Holonyms:
rutile, ilmenite