(N) :
A trefoil arch, or three-foiled cusped arch (occasionally trilobite arch, no connection to an actual trilobite), is an arch incorporating the shape or outline of a trefoil – three overlapping circles.
(N) :
A trefoil arch, or three-foiled cusped arch (occasionally trilobite arch, no connection to an actual trilobite), is an arch incorporating the shape or outline of a trefoil – three overlapping circles.