The Collaborative International Dictionary
Multifoil \Mul"ti*foil\ (m[u^]l"t[i^]*foil), n. [Multi- + foil.] (Arch.) An ornamental foliation consisting of more than five divisions or foils. [R.] See Foil.
Multifoil \Mul"ti*foil\, a. Having more than five divisions or foils.
Wiktionary
n. (context architecture English) A symmetrical shape which forms the overall outline of a set of partially-overlapping circles of the same diameter.
Usage examples of "multifoil".
Would it,' he asked the ancestor, 'be a silver-gilt porringer on a circular moulded foot, the lower part chased with acanthus foliage, with beaded scroll handles, the cover surmounted by a foliage on a rosette of swirling acanthus leaves, the stand of tazza form on circular detachable feet with acanthus border joined to a multifoil plate, the palin top with upcurved rim?
A tessellation of quatrefoils and blind multifoils ran riot at the roofline.