mullion (redirected from Munnion)

mullion (mŭl`yən), in architecture, a slender, upright intermediate member that subdivides an opening, as a division between panes of a window or between adjacent windows. Although the mullion occurs in some form in nearly all architectural styles, it is perhaps most characteristic of the elaborate Gothic systems of stone tracery.

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mullion

1. a vertical member between the casements or panes of a window or the panels of a screen

2. one of the ribs on a rock face

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mullion [′məl·yən]

(building construction)

A vertical bar separating two windows in a multiple window.

(geology)

In folded sedimentary and metamorphic rocks, a columnar structure in which the rock columns seem to intersect.