trumpet arch(n = noun.artifact) - a conical squinch;
is a kind of squinch

abutment arch, alveolar arch, angel's trumpet, aortic arch, arch, arch brick, arch over, arch stone, arch support, basket-handle arch, bell arch, branchial arch, broken arch, camber arch, corbel arch, diminished arch, drop arch, ear trumpet, evening trumpet flower, fallen arch, flat arch, four-centered arch, gill arch, golden trumpet, gothic arch, haemal arch, hemal arch, horseshoe arch, humming bird's trumpet, in an arch manner, keel arch, lancet arch, maya arch, mayan arch, metatarsal arch, moorish arch, nepal trumpet flower, neural arch, ogee arch, pectoral arch, pelvic arch, pier arch, pointed arch, proscenium arch, rampant arch, red angel's trumpet, roman arch, round arch, rowlock arch, safety arch, scheme arch, scoinson arch, sconcheon arch, sea trumpet, segmental arch, semicircular arch, shouldered arch, skeen arch, skene arch, skew arch, speaking trumpet, steel arch bridge, straight arch, sunken arch, superciliary arch, three-centered arch, trefoil arch, trimmer arch, triumphal arch, trumpet, trumpet creeper, trumpet flower, trumpet honeysuckle, trumpet section, trumpet tree, trumpet vine, trumpet weed, tudor arch, vertebral arch, water trumpet, white trumpet lily, yellow trumpet, zygomatic arch