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  1. Oxford Dictionary

    nitrogen

    • IPA[ˈnʌɪtrədʒ(ə)n]

    英式

    • n.
      the chemical element of atomic number 7, a colourless, odourless unreactive gas that forms about 78 per cent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.

    • noun: nitrogen

    • 相關詞

    nitrogen mustard

    • n.
      any of a group of organic compounds containing the group —N(CH2CH2Cl)2. They are powerful ...

    Oxford Dictionary

    nitrogen mustard

    • n.
      any of a group of organic compounds containing the group —N(CH2CH2Cl)2. They are powerful ...

    Oxford American Dictionary

    nitrogen monoxide

    • n.
      another term for nitric oxide

    Oxford American Dictionary

    nitrogen dioxide

    • n.
      a reddish-brown poisonous gas occurring commonly as an air pollutant, formed by the oxidation ...

    Oxford Dictionary

    nitrogen monoxide

    • n.
      a colourless toxic gas formed in many reactions in which nitric acid is reduced. It reacts ...

    Oxford Dictionary

    nitrogen dioxide

    • n.
      a reddish-brown poisonous gas occurring commonly as an air pollutant, formed by the oxidation ...

    Oxford American Dictionary

    nitrogen narcosis

    • n.
      a drowsy state induced by breathing air under pressure, e.g. in deep-sea diving.

    Oxford Dictionary

    nitrogen fixation

    • n.
      the chemical processes by which atmospheric nitrogen is assimilated into organic compounds, ...

    Oxford Dictionary

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    nitrogen

    • IPA[ˈnītrəj(ə)n]

    美式

    • n.
      the chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about ...

    Oxford American Dictionary