[n. nahy-treyt, -trit; v. nahy-treyt]
Chemistry. a salt or ester of nitric acid, or any compound containing the univalent group –ONO 2 or NO 3 .
fertilizer consisting of potassium nitrate or sodium nitrate.
cellulose nitrate, a substance used as a film base in the early days of filmmaking.
Informal. nitrate film.
verb (used with object), nitrated, nitrating.
to treat with nitric acid or a nitrate.
to convert into a nitrate.

1785–95; nitr- + -ate2

nitration, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
nitrate (ˈnaɪtreɪt)
1.  any salt or ester of nitric acid, such as sodium nitrate, NaNO3
2.  a fertilizer consisting of or containing nitrate salts
3.  (tr) to treat with nitric acid or a nitrate
4.  to convert or be converted into a nitrate
5.  to undergo or cause to undergo the chemical process in which a nitro group is introduced into a molecule

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

nitrate ni·trate (nī'trāt', -trĭt)

  1. The univalent radical NO3.

  2. A compound containing such a radical, such as a salt or ester of nitric acid.

v. ni·trat·ed, ni·trat·ing, ni·trates
To treat with nitric acid or a nitrate, usually to change an organic compound into a nitrate.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
nitrate   (nī'trāt')  Pronunciation Key 
A salt or ester of nitric acid, containing the group NO3. Nitrates dissolve extremely easily in water and are an important component of the nitrogen cycle. Compare nitrite.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Ammonia gets converted into nitrites and nitrates, which when sprinkled onto
  plants, allow them to grow larger.
It should be noted that algae growth happens in the presents of nitrates and
  phosphates, usually found in agricultural runoff.
The nitrates and other minerals can easily be recaptured and reprocessed by
  plants into a useable medium.
During this unit students will be testing their tap water for chlorine and
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