English Words Starting With N

• nitrogen base

  nounC1/C2
  /ˈnaɪ.trə.dʒən ˌbeɪs/A nitrogenous molecule that serves as a fundamental component of nucleic acids (DNA and RNA) and can accept a hydrogen ion (proton).
• nitrogen cycle

  nounC1
  /ˈnaɪ.trə.dʒən ˌsaɪ.kəl/The series of processes by which nitrogen and its compounds are interchanged in the environment and in living organisms, including nitrogen fixation, nitrification, and denitrification.
• nitrogen dioxide

  nounC1/C2
  /ˈnaɪ.trə.dʒən daɪˈɒk.saɪd/A toxic reddish-brown gas with the chemical formula NO₂, produced by combustion and involved in atmospheric pollution.
• nitrogen fixation

  nounLow
  /ˈnaɪ.trə.dʒən fɪkˈseɪ.ʃən/The chemical process by which atmospheric nitrogen (N₂) is converted into ammonia (NH₃) or related nitrogenous compounds, making it available for biological use.
• nitrogen fixer

  nounC1/C2
  /ˈnaɪ.trə.dʒən ˌfɪk.sə/An organism (usually a bacterium or legume root nodule) that converts atmospheric nitrogen into a form usable by plants.
• nitrogen monoxide

  nounC2
  /ˌnaɪ.trə.dʒən mɒˈnɒk.saɪd/A colourless, toxic gas with the chemical formula NO.
• nitrogen mustard

  nounLow/Very Specialized
  /ˈnaɪ.trə.dʒən ˈmʌs.təd/A class of chemical compounds related to mustard gas, used as chemotherapeutic agents to treat cancer by damaging DNA.
• nitrogen narcosis

  nounC2
  /ˈnaɪ.trə.dʒən nɑːˈkəʊ.sɪs/A reversible state of altered consciousness and impaired mental and motor function caused by breathing nitrogen under high pressure, typically experienced by deep-sea divers.
• nitrogen peroxide

  nounC2
  /ˈnaɪ.trə.dʒən pəˈrɒk.saɪd/A chemical compound consisting of nitrogen and oxygen, often referring specifically to nitrogen dioxide (NO₂).
• nitrogen tetroxide

  nounRare
  /ˈnaɪ.trə.dʒən teˈtrɒk.saɪd/A chemical compound with the formula N₂O₄, existing as a dimer of nitrogen dioxide (NO₂). It is a reddish-brown gas or liquid.
• nitrogenase

  nounLow
  /ˈnaɪ.trə.dʒə.neɪz/An enzyme that catalyzes the reduction of atmospheric nitrogen (N₂) to ammonia (NH₃).
• nitrogenize

  verbverb-transitiveVery Low (Technical term)
  /ˈnaɪ.trə.dʒə.naɪz/To treat, combine, or impregnate with nitrogen.
• nitroglycerin

  nounC2
  /ˌnaɪ.trəʊˈɡlɪs.ər.iːn/A highly unstable, oily explosive liquid compound (C3H5N3O9).
• nitroglycerine

  nounC2
  /ˌnaɪ.trəʊˈɡlɪs.ər.iːn/A highly explosive liquid, C₃H₅N₃O₉, produced by reacting glycerol with nitric and sulfuric acids.
• nitrohydrochloric acid

  nounC1/C2
  /ˌnaɪtrəʊˌhaɪdrəʊˈklɒrɪk ˈæsɪd/A highly corrosive, fuming yellow liquid mixture of concentrated nitric acid and concentrated hydrochloric acid, typically in a 1:3 ratio.
• nitromannitol

  nounExtremely Rare
  /ˌnaɪ.trəʊˈmæn.ɪ.tɒl/A chemical compound derived from mannitol by nitration, often used in research contexts.
• nitromersol

  nounVery Low
  /ˌnʌɪtrəʊˈmɜːsɒl/A synthetic organic mercury compound used as an antiseptic and disinfectant.
• nitrometer

  nounVery Rare
  /naɪˈtrɒmɪtə/An instrument or apparatus for measuring the amount of nitrogen, especially in a compound, gas, or the air.
• nitromethane

  nounC2/Advanced
  /ˌnaɪtrəʊˈmiːθeɪn/A highly flammable, oily liquid chemical compound (CH₃NO₂) with a distinctive odour, used as a solvent and as a fuel additive in high-performance engines.
• nitroparaffin

  nounVery Low
  /ˌnaɪtrəʊˈpærəfɪn/A type of chemical compound, specifically a nitroalkane, derived from a paraffin hydrocarbon by replacing a hydrogen atom with a nitro group (-NO₂).

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