Lucarnes are often referred to as dormer windows. They are a type of window that projects vertically from a sloping roof and are typically found in attics. Other synonyms for lucarnes include roof windows, skylights, attic windows, gable windows, and rooftop windows. Roof windows are often used in modern architectural designs to allow for natural light and ventilation in spaces that would otherwise be dark and cramped. Skylights are commonly used in commercial and industrial buildings to bring natural light into large areas such as offices and factories. Overall, lucarnes and their synonyms serve an important purpose in allowing natural light and fresh air into spaces that would otherwise be cut off from them.