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.
External Facade. Timber cladding forms the external facade of buildings. It acts as a rainscreen cladding which is the outer wall of a double wall construction. The inner wall is separated by a cavity that is well ventilated so that any moisture that penetrates the cladding gets evaporated or drains away.onstruction. Cladding is laid in a number of different ways according to the aesthetics required for the building. Boards are orientated vertically, horizontally or diagonally. Thin pieces of wood called battens are fixed to the inner wall as support for the cladding.