At my school (in the Physics lab), there's a built in cabinet to store things like lenses, sheets of paper, screw gauge, vernier callipers, stopwatch etc. A teacher was looking for something. That cabinet has many doors; compartments (kind of like small, separate cabinets). The other teacher opens the wrong door and my teacher says:
No it's in the lower cabinet.
Will it be called a "cabinet"? Or is it just a "compartment" and is the use of "lower" natural?