horseshoe arch(n = noun.artifact) moorish arch - a round arch that widens before rounding off;
is a kind of round arch

abutment arch, alveolar arch, aortic arch, arch, arch brick, arch over, arch stone, arch support, asian horseshoe crab, basket-handle arch, bell arch, branchial arch, broken arch, camber arch, corbel arch, diminished arch, drop arch, fallen arch, flat arch, four-centered arch, gill arch, gothic arch, haemal arch, hemal arch, horseshoe, horseshoe bat, horseshoe crab, horseshoe falls, horseshoe vetch, horseshoe whipsnake, in an arch manner, keel arch, lancet arch, maya arch, mayan arch, metatarsal arch, moorish arch, neural arch, ogee arch, orange horseshoe bat, pectoral arch, pelvic arch, pier arch, pointed arch, proscenium arch, rampant arch, roman arch, round arch, rowlock arch, safety arch, scheme arch, scoinson arch, sconcheon arch, segmental arch, semicircular arch, shouldered arch, skeen arch, skene arch, skew arch, steel arch bridge, straight arch, sunken arch, superciliary arch, three-centered arch, trefoil arch, trimmer arch, triumphal arch, trumpet arch, tudor arch, vertebral arch, zygomatic arch