Medical Definition of NITRIFICATION. : the oxidation (as by bacteria) of ammonium salts to nitrites and the further oxidation of nitrites to nitrates.See nitrification defined for kids.ADVERTISEMENT.edical Definition of NITRIFICATION. : the oxidation (as by bacteria) of ammonium salts to nitrites and the further oxidation of nitrites to nitrates.
1. cladding-a protective covering that protects the outside of a building. facing. protective cover, protective covering, protection-a covering that is intend to protect from damage or injury; they had no protection from the fallout; wax provided protection for the floors.
Freebase(0.00 / 0 votes)Rate this definition: A facade or faÃ§ade is generally one exterior side of a building, usually, but not always, the front. The word comes from the French language, literally meaning frontage or face. In architecture, the faÃ§ade of a building is often the most important from a design standpoint, as it sets the tone for the rest of the building.