Noun | 1. | ![]() corpus sternum, gladiolus - the large central part of the breastbone manubrium - the upper part of the breastbone xiphoid process - smallest of the three parts of the breastbone; articulates with the corpus sternum and the seventh rib chest, pectus, thorax - the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates axial skeleton - the part of the skeleton that includes the skull and spinal column and sternum and ribs |