What do a.m. and p.m. stand for?


[n. nahy-treyt, -trit; v. nahy-treyt] /n. ˈnaɪ treɪt, -trɪt; v. ˈnaɪ treɪt/
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.
Origin of nitrate
1785-95; nitr- + -ate2
Related forms
nitration, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for nitrate
  • Pollutants from fertilizer runoff, such as nitrate and nitrite, are also removed.
  • One promising area is the trading of nitrate emissions between factories and farmers.
  • It may be light, or a familiar nutrient such as nitrate or phosphate.
  • The former turns ammonia into nitrite, which the latter then converts to nitrate, a potent fertilizer.
  • Clostridia bacteria also have an enzyme that reduces nitrate to nitrite.
  • The gel's active ingredient, glyceryl nitrate, has been used for as a vasodilator for over a century.
  • Our setup had the nitrate negatives in mind more than anything.
British Dictionary definitions for nitrate


any salt or ester of nitric acid, such as sodium nitrate, NaNO3
a fertilizer consisting of or containing nitrate salts
(transitive) to treat with nitric acid or a nitrate
to convert or be converted into a nitrate
to undergo or cause to undergo the chemical process in which a nitro group is introduced into a molecule
Derived Forms
nitration, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
Word Origin and History for nitrate

1794, from French nitrate (1787) or formed in English from nitre + -ate (3). Related: Nitrates.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
nitrate in Medicine

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.
Cite This Source
nitrate in Science
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.
Cite This Source

Word of the Day

Difficulty index for nitrate

All English speakers likely know this word

Word Value for nitrate

Scrabble Words With Friends

Nearby words for nitrate