1) Component 2) Constituent 3) Element 
Landside is 'this side' of the air cargo terminal at an airport. When a consignment has been checked and is put into the airport's secure area it is then airside.
Those parts of an airport not considered airside. Access is open to all persons legally entitled to be at an airport, subject to local and national laws.
[n] - component consisting of a side piece opposite the moldboard
noun component consisting of a side piece opposite the moldboard