[ nahy-truh-fi-key-shuh n ]
/ ˌnaɪ trə fɪˈkeɪ ʃən /


the act of nitrifying.

Origin of nitrification

First recorded in 1820–30; nitr- + -i- + -fication Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nitrification

British Dictionary definitions for nitrification

/ (ˌnaɪtrɪfɪˈkeɪʃən) /


the oxidation of the ammonium compounds in dead organic material into nitrites and nitrates by soil nitrobacteria, making nitrogen available to plantsSee also nitrogen cycle
  1. the addition of a nitro group to an organic compound
  2. the substitution of a nitro group for another group in an organic compound
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

Medicine definitions for nitrification

[ nī′trə-fĭ-kāshən ]


The oxidation of an ammonia compound into nitric acid, nitrous acid, or any nitrate or nitrite, especially by the action of bacteria.
The treatment or combination of a substance with nitrogen or compounds containing nitrogen.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for nitrification

[ nī′trə-fĭ-kāshən ]

The process by which bacteria in soil and water oxidize ammonia and ammonium ions and form nitrites and nitrates. Because the nitrates can be absorbed by more complex organisms, as by the roots of green plants, nitrification is an important step in the nitrogen cycle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.