mullion

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

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Mullion

A dividing piece between the lights of windows, usually taking on the characteristics of the style of the building.

Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

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.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

mullion

mullions: a

A vertical member separating (and often supporting) windows, doors, or panels set in series. also see door mullion.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.