Arc polylobé (multi-foil arch ©)

The translation in the title is followed by this sign ©; this means that it has been "invented" by me.

These arcs (arches) are quite common in Moorish architecture, as can be seen in this picture, made in the Mezquita in Córdoba.
A less intricate form has been used in Cluny in the wall of 2 Place Notre Dame.
The arch in this picture is an arc trilobé (trefoil arch); there are also varieties called arcs quintilobé (with 5 foils), etc.
See also lobe.

Mezquita - Córdoba

2 Place Notre-Dame - Cluny