Which term describes a framing component that separates different sections of a window?

The term that describes a framing component that separates different sections of a window is "mullion." Mullions are vertical or horizontal bars that divide a window into different parts or sections, enhancing both structural integrity and aesthetic appeal. They create distinct areas within a window frame, which can also help support the weight of the materials above the window.

While "muntin" also refers to a framing element, it specifically describes the narrow strips that hold the individual panes of glass within a window, rather than separating the entire window into different sections. The "newell post" is a post at the top or bottom of a staircase that supports the handrail, and "door jamb" refers to the vertical portion of the frame that supports a door, neither of which are relevant to window framing. Understanding the difference between these terms helps clarify the specific functions and designs of window components in construction and architecture.