semicircular arch Definition

roman arch, romanesque, arc, beading, bail, cope, reed, roman, lunette, bead, breve, tiara, vestibule, apse, bay window, crosstrees, flute, glute, orchestra, quonset, roundel, semidome, stake, stakes, staking, torus, baguette, basilica, battery, bay, bucket, canal, clamp, corrie, crescent, cwm, ear, earwig, fan, fanlight, garter, pantile, scallop, seating, sensation, sense, sickle, theatre, tile, turnover, shouldered arch, segmental arch, chasuble, diaphragm, diffraction, embrasure, eye, eyes, gap, gapped, generation, gsp, hiatus, image, imaging, jamb, leak, lobe, loophole, opening, port, ports, slot, stop, stops, supplement, valve, vent, vented, venting, vignetter, arced, atrium, spire, wicket, stigma, aaa, asymptote, beads, blank, brace, braces, brachiopoda, breach, camera, camera obscura, circle, circles, circling, clepsydra,