“O” is for oriel — not to be mistaken for Baltimore’s baseball team or a famous sandwich cookie. It’s actually a specific type of window.
An oriel window is a variation of a bay window with one major distinguishing feature: An oriel window does not touch the ground. This distinctive window type projects from the wall like a bay window in either a faceted or bow shape, but an oriel window is supported by brackets or corbels. Most commonly found on the upper stories of buildings, oriel windows also appear on the first floor, provided they do not touch the ground. CLICK HERE to read the full article.