thorax/ˈθɔræks/Pluralthoraxes1the middle part in the body of an insect between the head and the abdomen that bears the limbs or wingsCopy2the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebratesCopySynonyms: chestpectus3the middle region of the body of an arthropod between the head and the abdomenCopy