an ornamental design having a large number of foils
See also trefoil (sense 4), quatrefoil (sense 2), cinquefoil (sense 2)
multifoil in American English
(ˈmʌltəˌfɔil)
Architecture
noun
1.
a foil, esp. one having more than five lobes
adjective
2. (of an arch, window opening, etc.)
having the form of a foil with more than five lobes
Word origin
[1825–35; multi- + foil2]This word is first recorded in the period 1825–35. Other words that entered Englishat around the same time include: cliché, relativity, self-help, spiritualism, torque