cusp

cusp

[kuhsp]

In architecture, the intersection of lobed or scalloped forms, particularly in arches (cusped arches) and tracery. Thus the three lobes of a trefoil (cloverleaf form) are separated by three cusps. Cusped forms appear in early Islamic work and were especially common in the Moorish architecture of North Africa and Spain. The form was adopted wholeheartedly by European Gothic architecture.

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