The term 'partitioned section' can be described as a COMPARTMENT, which is an 11-letter word. A COMPARTMENT is a division or area that is separated from the rest of a larger space. It is typically used to store items or to separate different types of materials. Compartments are often found in storage containers, drawers, and other organizational systems. They can also be used to divide a room into sections, such as in a classroom or office.