What does nitrifying mean?
Nitrifying describes microorganisms, especially bacteria and archaea, that carry out key stages of the nitrogen cycle. They oxidize ammonia to nitrite or oxidize nitrite to nitrate, ultimately making nitrogen available to plants in a form they can absorb. The process is especially important in soils, lakes, rivers, wastewater-treatment systems, and marine environments. “Nitrifying bacteria” is the most common expression, although the term is also used for nitrifying archaea and related microbial communities. The word belongs primarily to scientific and environmental writing, so it is less common in general conversation. It should not be confused with nitration, which is a chemical reaction involving the addition of a nitro group, or with nitrogen fixation, the conversion of atmospheric nitrogen into other compounds. In everyday environmental reporting, the distinction is often implicit because nitrifying organisms are discussed as part of natural nutrient cycling.
adjectiveNitrifying means relating to or causing the conversion of ammonia into nitrite and nitrate. It is most commonly used to describe microorganisms that carry out this process in soil, water, and other environments.
- Relating to or carrying out the biological conversion of ammonia into nitrite and nitrate.
- Relating to microorganisms that oxidize ammonia or nitrite as part of the nitrogen cycle.
"Nitrifying bacteria help make nitrogen available to plants by converting ammonia into nitrate."
"Nitrifying bacteria populate the soil around the roots of the trees."
"The wetland’s water quality depends partly on populations of nitrifying microorganisms."
Nitrifying microbes perform a vital step in Earth’s nitrogen cycle, helping make nitrogen available in a form plants can absorb.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nitrifying come from?
Nitrifying is the present-participle form of nitrify, which was formed from nitrate and the suffix -ify. Nitrate in turn derives through French nitrate from Latin nitratus, associated with nitrum, a term ultimately borrowed from Greek nitron, referring to native sodium carbonate or saltpetre. The scientific sense developed with the identification of microorganisms that oxidize ammonia and nitrite during the nitrogen cycle.
Related word forms
How nitrifying is actually used
This is a technical term used chiefly in biology, environmental science, microbiology, and related fields. It is normally attributive, as in “nitrifying bacteria,” rather than used as a standalone verb form.
Easily confused with nitrifying
Nitrifying describes microorganisms or processes involved in the biological oxidation of ammonia, whereas nitrating refers to introducing a nitro group into a chemical compound.