Which window design has numerous pieces of adjustable glass sections that overlap when closed?

The design that features numerous pieces of adjustable glass sections that overlap when closed is known as a jalousie window. Jalousie windows are composed of several horizontal glass slats that can be opened and closed individually, allowing for ventilation and light control while maintaining privacy. When the slats are fully closed, they overlap to minimize gaps, providing a degree of weather resistance and security. This design is particularly beneficial in warm climates, as it enables airflow while shielding against the elements.

Other window types like casement, sliding, and bay windows do not share this overlapping feature with adjustable glass sections. A casement window typically swings open like a door, sliding windows slide horizontally to open, and bay windows consist of a series of windows that protrude from the wall but do not have adjustable glass sections that overlap.