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tr.v. ni·tri·fied, ni·tri·fy·ing, ni·tri·fies
1. To oxidize (an ammonia compound) into a nitrite or (a nitrite) into a nitrate, especially by the action of nitrifying bacteria.
2. To treat or combine with nitrogen or compounds containing nitrogen.

ni′tri·fi·ca′tion (-fĭ-kā′shən) n.
ni′tri·fi′er n.


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


The process by which bacteria in soil oxidize ammonia and form nitrates and nitrites. Because the nitrates and nitrites can be absorbed by the roots of green plants, nitrification is an important step in the nitrogen cycle.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.nitrification - the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)
chemical action, chemical change, chemical process - (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved
2.nitrification - the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)
plant life, flora, plant - (botany) a living organism lacking the power of locomotion
oxidation, oxidisation, oxidization - the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction


[ˌnaɪtrɪfɪˈkeɪʃn] nnitrificazione f
References in periodicals archive ?
Furthermore, the activity of the heterotrophic bacterial population and the nitrification efficiency of a submerged biological filter were studied, for an influent TAN concentration of 2 mg [L.
Factors influencing the nitrification efficiency of fluidized bed filter with a plastic bead medium.
Although the nitrification filter at the Croissy plant has normally operated well, there have been episodes of poor nitrification efficiency occurring without warning.