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.
facade. (fÉsaed`) , fÉsÃ¤d exterior face or wall of a. Building the term implies ordered placement of its openings and other features and thus seems inapplicable to a wall without. designt was larger than the largest of the palaces or ruins I knew, and the facade had an Oriental look: the face of it having the lustre, as well as the pale-green tint, a kind of bluish-green, of a certain type of Chinese porcelain. The Time Machine by Wells, H.G. View in context.