Origin of mullion
OTHER WORDS FROM mullionun·mul·lioned, adjective
How to use mullion in a sentence
The mullions, or radii, are all faced with small pillars and capitals, and lined with the dog-toothed quatrefoil.
The circle of the central pediment is divided by mullions into eight lights, under trefoil arches radiating from an orb.
It was built of nice old red stone, or brick, with grey mullions and gables to the roof.Grandmother Dear|Mrs. Molesworth
The westernmost window is smaller than the rest, and is of three lights, with the mullions carried up through the head.
As is often the case in late work, there are no sub-arches in the tracery, and the mullions are carried up through the head.