sexfoiledadj.

1846 Ecclesiologist 6 69 The clerestory is Middle-Pointed, of sexfoiled circles.

1851 T. H. Turner Some Acct. Domest. Archit. I. iv. 167 The highest part of which [window] is sex-foiled.

1910 T. F. Bumpus Cathedrals Northern France 188 The upper arches [subdivided]..into two trefoil-headed compartments, surmounted by a large sexfoiled circle.

1977 J. W. Tonkin Herefordshire vii. 151 The church has a fine fourteenth-century roof of arch-braced collar construction with two tiers of curved wind-braces, the lower being cusped to form sexfoiled arches.

1996 J. Musgrove in J. Turner Dict. Art II. 347/2 There was an obvious connection between the drawing of polygons and the invention of bar tracery at the beginning of the 13th century: sexfoiled and cinquefoiled oculi figure prominently among the earliest traceried windows.