rhenium

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys;
is obtained as a by-product in refining molybdenum
• Syn:
Re, atomic number 75
• Hypernyms:
metallic element, metal

• Từ đồng nghĩa / Synonyms:
  Re, atomic number 75