Dictionary
mul•ti•foil
Pronunciation: (mul'tu-foil"), [key] Archit.
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n.
a foil, esp. one having more than five lobes.
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adj.
(of an arch, window opening, etc.) having the form of a foil with more than five lobes.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.