English Words Starting With N

• nitriding steel

  nounC2
  /ˈnaɪ.traɪ.dɪŋ stiːl/A type of alloy steel specially treated with nitrogen to increase surface hardness.
• nitrification

  nounC2
  /ˌnaɪtrɪfɪˈkeɪʃ(ə)n/The biological oxidation of ammonia to nitrite and then to nitrate.
• nitrifier

  nounC2 (Very Low Frequency)
  /ˈnaɪ.trɪ.faɪ.ə/An organism or substance that converts ammonia or other nitrogen compounds into nitrites and nitrates.
• nitrify

  verbverb-transitivelow
  /ˈnaɪtrɪfaɪ/to convert nitrogen compounds into nitrates, especially through bacterial action.
• nitrile

  nounC2 / Specialised
  /ˈnʌɪtrʌɪl/A type of synthetic organic compound containing the functional group -C≡N.
• nitrile rubber

  nounC2
  /ˈnaɪ.traɪl ˈrʌb.ə/A synthetic rubber copolymer derived from acrylonitrile and butadiene.
• nitrite

  nounC2
  /ˈnaɪtraɪt/A chemical compound containing the nitrite ion (NO₂⁻).
• nitro

  adjectivecombining-formnounC1
  /ˈnaɪ.trəʊ/A prefix or shorthand term referring to nitrogen, especially in chemical compounds (like nitroglycerine) or in contexts involving high power or acceleration.
• nitro compound

  nounC2
  /ˌnʌɪtrəʊ ˈkɒmpaʊnd/An organic compound containing one or more nitro functional groups (-NO₂) bonded to a carbon atom.
• nitro group

  nounVery Low (specialist scientific term)
  /ˈnaɪtrəʊ ˌɡruːp/A functional group in organic chemistry consisting of one nitrogen atom bonded to two oxygen atoms, with the formula −NO₂.
• nitro-chalk

  nounVery Low
  /ˌnʌɪtrəʊˈtʃɔːk/A commercial fertilizer made by mixing ammonium nitrate and calcium carbonate (chalk).
• nitrobacteria

  plural-nounVery Low
  /ˌnʌɪtrəʊbakˈtɪərɪə/A genus of bacteria that oxidize nitrites to nitrates as part of the nitrogen cycle.
• nitrobenzene

  nounVery low
  /ˌnaɪtrəʊˈbɛnziːn/A pale yellow, oily, toxic liquid aromatic compound with the chemical formula C₆H₅NO₂, produced by nitrating benzene.
• nitrocellulose

  nounLow (Specialist)
  /ˌnaɪ.trəʊˈsel.jʊ.ləʊz/A highly flammable compound produced by treating cellulose (e.g., from cotton or wood pulp) with nitric and sulphuric acids.
• nitrochloroform

  nounRare
  /ˌnaɪtrəʊˈklɔːrəfɔːm/A colorless, heavy, liquid chemical compound, primarily used as a soil fumigant and insecticide.
• nitrocotton

  nounC2
  /ˌnaɪ.trəʊˈkɒt.ən/A highly flammable and explosive substance made by treating cotton or other cellulose material with nitric and sulphuric acids, forming cellulose nitrate.
• nitrofurantoin

  nounLow
  /ˌnaɪtrəʊfjʊˈræntəʊɪn/A synthetic antibacterial drug used primarily to treat and prevent urinary tract infections.
• nitrogelatin

  nounVery Low
  /ˌnaɪ.trəʊˈdʒɛl.ə.tɪn/A powerful explosive substance made by combining nitroglycerin with a gelatinous base, typically nitrocellulose.
• nitrogen

  nounB2
  /ˈnaɪ.trə.dʒən/A chemical element (symbol N, atomic number 7) that is a colourless, odourless gas making up about 78% of Earth's atmosphere. It is essential for life as a component of proteins and nucleic acids.
• nitrogen balance

  nounLow
  /ˈnaɪ.trə.dʒən ˈbæl.əns/The quantitative difference between nitrogen intake (from food/protein) and nitrogen excretion (in urine, feces, sweat); a measure of protein metabolism and nutritional status.

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