A bay window is a window rising from the ground and forming a bay or recess in a room, and projecting outward from the wall, either in a rectangular, polygonal, or semicircular form. Research Bay Window
A bow window is a elliptically curved window projecting from the face of a wall. Bow windows originated with the late Gothic style. While a bay window reaches to the ground, a bow window differs in not reaching the ground. Research Bow Window
In architecture, the term carol described a small closet or enclosure built against a window on the inner side, to sit in for study - like a bay window. The term was used until about the 16th century. Research Carol
In architecture, an oriel window is a window projecting from the outer face of a wall, in plan semi- hexagonal, semi-octagonal, or rectangular, thus having three or more sides, divided by mullions and transoms into different bays and other projections, and supported by brackets or corbels. A projecting window rising from the ground is sometimes called an oriel window, but is more properly a bay window. Research Oriel Window
 
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