gymnasium, rotunda, foyer, courtyard, galleria, skylit, breezeway, entryway, concourse, colonnade, dining room, staircase, entranceway, spiral staircase, auditorium, plaza, oculus, skywalk, walkway, hallway, skylight, archway, clerestory, stairwell, portico, ballroom, stairway, alcove, diningroom, floors, arches, narthex, loggia, undercroft, breezeways, airy, promenade deck, lounge, canopy, vestibule, terrace, skyway, ceilings, quadrangle, fountain, sundeck, bowfront, elevator, cupola, dome, amphitheater, romanesque architecture, art deco, balcony, doorway, transept, nave, pavilion, square foot, balustrade, chandelier, elevator shaft, cafeteria, facade, entrance, mansard roof, piazza, fanlight, sunroom, rooms, pilasters, veranda, hall, freight elevator, tower, stairs, campanile, lobby, newel post, peristyle, building, rathskeller, cavelike, deck, gallery, proscenium arch, apse, ramada, kiva, demilune, cantilevering, passageway, pedestrian bridge, chapel, gothic arch, skyscraper, allee, breakfast nook, gazebo, anteroom, upstairs, storey, ventricle, atria, porticos, chambers, corral, arcade, canyon, cella

atrium cordis, atrium of the heart

atrial auricle, atrioventricular node, atrioventricular valve, auricle, auricula, auricular appendage, auricular appendix, auricula atrii, bicuspid valve, coronary sinus, heart ventricle, inferior vena cava, left atrioventricular valve, left ventricle, mitral valve, mitral valve prolapse, oblique vein of the left atrium, postcava, precava, pulmonary vein, right atrioventricular valve, right ventricle, sinus coronarius, superior vena cava, tricuspid valve, vena cava, vena obliqua atrii sinistri, vena pulmonalis, ventricle

chamber, court, courtyard