mul·lion 
(mŭlyən)
(mŭlyən)n.
A vertical member, as of stone or wood, dividing a window or other opening.
[Alteration of Middle English moniel, from Anglo-Norman moynel, perhaps from moienel, middle, from moien, from Latin mediānus, from medius; see medhyo- in the Appendix of Indo-European roots.]
mullioned (mŭlyənd) adj.
mullionmullioned windows
- collage
- collage film
- collagen
- collagenase
- collagenic
- collagenous
- collagen vascular disease
- collagist
- collapse
- collapsibility
- collapsible
- collar
- collarbone
- collar cell
- collard
- collard greens
- collards
- collared
- collared peccary
- collate
- collateral
- collateral damage
- collateralization
- collateralize
- collateralized debt obligation