WordReference Random House Learner's Dictionary of American English © 2019
ni•trate /ˈnaɪtreɪt, -trɪt/USA pronunciation   n. [countable]
  1. Chemistrya chemical compound with nitrogen and oxygen in it.
  2. Chemistry, Agriculturefertilizer made up of potassium nitrate or sodium nitrate.

WordReference Random House Unabridged Dictionary of American English © 2019
ni•trate  (n. nītrāt, -trit;v. nītrāt),USA pronunciation n., v.,  -trat•ed, -trat•ing. 
n. 
  1. [Chem.]a salt or ester of nitric acid, or any compound containing the univalent group –ONO2 or NO3.
  2. fertilizer consisting of potassium nitrate or sodium nitrate.
  3. Cinemacellulose nitrate, a substance used as a film base in the early days of filmmaking.
  4. Cinema[Informal.]See  nitrate film. 

v.t. 
  1. to treat with nitric acid or a nitrate.
  2. to convert into a nitrate.
ni•tration, n. 
  • nitr- + -ate2 1785–95


Collins Concise English Dictionary © HarperCollins Publishers::

nitrate /ˈnaɪtreɪt/ n
  1. any salt or ester of nitric acid, such as sodium nitrate, NaNO3
  2. a fertilizer consisting of or containing nitrate salts
vb
  1. (transitive) to treat with nitric acid or a nitrate
  2. to convert or be converted into a nitrate

niˈtration n



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