
• (n.) An ornamental foliation having four lobes, or foils.
Found on
http://thinkexist.com/dictionary/meaning/quarterfoil/
Quar'ter·foil` noun [
Quarier +
foil : confer French
quatre .]
(Architecture) An ornamental foliation having four lobes, or foils.
Found on
http://www.encyclo.co.uk/webster/Q/5

In architecture a quarterfoil is an ornamental foliation having four lobes, or foils. The term quatrefoil is applied to a square panel, or a piercing in the tracery of a window, etc, divided by cusps or featherings into four leaves. .Bands of small quatrefoils are much used as ornaments in the Perpendicular style, and sometimes in the Decorated sty...
Found on
http://www.probertencyclopaedia.com/browse/TQ.HTM
No exact match found.