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TOEFL IELTS BNC: 6287 COCA: 5881
nitrogen
noun [U] chemistry /ˈnaɪtrədʒ(ə)n/
  1. a chemical element that is a colourless odourless gas. It exists in large quantities in the air that we breathe and its symbol is N.
     Synonyms and related words
    Gases: acetylene, ammonia, argon...

derived word

nitrogenous

/naɪˈtrɒdʒənəs/ adjective
 Synonyms and related words
Describing chemicals and chemical processes: active, aerobic, alkaline...

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