argon

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a colorless and odorless inert gas;
one of the six inert gases;
comprises approximately 1% of the earth's atmosphere (Freq. 7)
• Syn:
Ar, atomic number 18
• Hypernyms:
chemical element, element, noble gas, inert gas, argonon
• Substance Holonyms:
air

• Từ đồng nghĩa / Synonyms:
  Ar, atomic number 18