Hypertext Webster Gateway: "mullion"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Mullion \Mul"lion\, n. [A corruption of munnion, F. moignon
stump of an amputated limb, stump, OF. moing mutilated; cf.
Armor. mo[~n], mou[~n], mank, monk, and also L. mancus
maimed.] (Arch.)
(a) A slender bar or pier which forms the division between
the lights of windows, screens, etc.
(b) An upright member of a framing. See {Stile}.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Mullion \Mul"lion\, v. t.
To furnish with mullions; to divide by mullions.
From WordNet (r) 1.7 (wn)
mullion
n : a nonstructural vertical strip between the casements or
panes of a window (or the panels of a screen)
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