D defs.my
Entry 2 senses Webster, 1913

Nitrification

· Ni·tri·fi·ca·tion · IPA
01 n. The act, process, or result of combining with nitrogen or some of its compounds.
  1. 1.
    The act, process, or result of combining with nitrogen or some of its compounds.(Chem.)
  2. 2.
    A process of oxidation, in which nitrogenous vegetable and animal matter in the presence of air, moisture, and some basic substances, as lime or alkali carbonate, is converted into nitrates.